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Old 04-23-2017, 08:36 PM   #201
Shucks
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Re: Project "You thought yours was bad!" '78 C10 Stepside

Looks real good! Can't wait to hear how the EFI works
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Old 04-25-2017, 12:46 AM   #202
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Re: Project "You thought yours was bad!" '78 C10 Stepside

Thanks! I'm excited too, it's taking too long at this final part!

So I got my driveshaft in today thinking that this was the final piece of the puzzle, that I could bolt it in, top off the trans, and fire it up. But when I went to mount the driveshaft to the axle, I couldn't get it to slide forward enough to come even close to getting the U-joint to make with the axle - the driveshaft was made too long! I called the shop and we verified that the specs and measurements given were correct, so I'm not sure what happened. But, they are willing to fix it for me if I drop it back off, so I'll be happy with that! I think between 3/4" to 1" shorter would be perfect. Unfortunately, with the time from dropping it off and picking it back up may leave me with limited time to actually mount and then be able to test fire this thing before I leave on my trip. Hopefully I can, but if not, I will have to leave you all as well as myself in suspense for two weeks!



Here is the yoke fully bottomed out in the transmission (note the mark)



And here is the yoke laid near the transmission with the U-joint seated in the axle (note mark again). There is some free area, but it is maybe 3/16" at most. Not good.



And here is the yoke bottomed out in the transmission, then pulled out 1" at proper free length setting. The U-joint sits almost perfectly 1" further back from the rear axle yoke.



I will be dropping this off extremely early Wednesday morning in hopes that this will be done in time before I go!
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Old 04-28-2017, 05:43 AM   #203
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Re: Project "You thought yours was bad!" '78 C10 Stepside

I'll just leave this here

Video of it running! https://www.youtube.com/watch?v=-yWL7IucV2E

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Old 04-28-2017, 12:15 PM   #204
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Re: Project "You thought yours was bad!" '78 C10 Stepside

Woohoo, so everything last night went pretty smoothly. Picked up my driveshaft, fit great this time. Topped off the trans, installed my new battery hold down clamp, primed the fuel pump a few times, hit the key and she fired right up without even a hint of hesitation! I let it run for about 15 minutes up to temp while keeping an eye on the trans fluid level. While I didn't get to drive it, the trans engaged into all gears and felt solid. The exhaust sounds great! It has a nice rumble and while it is obviously far from stock, is thankfully just quiet enough where it shouldn't wear on me during long drives.

I've unfortunately ran out of time before my 2 week trip down to Texas, as I'm leaving right after work tonight. But there's minimal things left to do to drive her! I still need to set the timing and phase the rotor, pick up an air filter, the air cleaner looks like it'll barely clear the linkage so I'll be picking up a 1" spacer for safety. Other than that, I just need to renew the registration and take it on a drive! Please check out the running video, I'll be trying to get a driving and maybe a walk around video here in the coming weeks!
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Old 04-28-2017, 08:41 PM   #205
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Re: Project "You thought yours was bad!" '78 C10 Stepside

Glad to see things working out. Have a safe trip.
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Old 04-28-2017, 11:57 PM   #206
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Re: Project "You thought yours was bad!" '78 C10 Stepside

Thank you! I'll keep you guys updated. Any more thoughts on the build so far, good or bad are appreciated!
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Old 05-01-2017, 02:54 AM   #207
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Re: Project "You thought yours was bad!" '78 C10 Stepside

She's sounding good man! I'm digging that last video!
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Old 05-15-2017, 09:03 PM   #208
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Re: Project "You thought yours was bad!" '78 C10 Stepside

Thanks man!

Alright, I'm finally back from my Texas trip! That was a ton of fun, but I was dying to get back to my truck the entire time. Today was my only day before I go back to work tomorrow, so I got the last little bit done, got new tags and insurance and took her out on the road!

I had to go to town and pick up a new timing light as the old Sun timing gun died. It was older than I was! This one seemed to work well for a basic model.



I set the timing on the engine to match the targeted timing on the Sniper handheld, then went to work changing out the distributor cap to phase the rotor. You can also see the plastic intake spacer I picked up. The metal one I got didn't work at all, this one works but is pretty cheesy. I think I'll just end up making my own at some point.



The other new cap modified. Turns out it was nearly impossible to see here, so I ended up with another hole on the top.



I also picked up a new air filter and stuck the dual snorkel air cleaner on! I love the stockish but stealthy look it gives the engine bay. I'll take it back off and paint it when I make a new spacer.



Double checked all the fluids and backed it outside for the first time! My coolant sensor was leaking, I must have forgotten to torque it down the rest of the way. Tightened it back down and everything was fine!



Whoops.



And here's the first drive! Stopped over and visited a friend who has this pre-47 Chevy. It has an LS1, T56, 4 link rear end, and 15x8/15x10 wheels. It's fast!





Overall I'm pretty happy with the truck! There's still a handful of bugs and little things I want to finish on it. I did notice that on a hard turn, my wheels barely rubbed the control arms, so I'll be going back under to do a little clearancing there. It drives straight down the road but I'll take it in for an alignment just to be safe. One or both of the idler pulleys on the accessory drive needs to be replaced, it squeaks a bit.

The one big issue I was having is that I seem to be getting some detonation/spark knock when I get into the throttle a bit trying to accelerate on the highway. Just starting off, up to about 15%+ throttle it is fine. If I try and get into the throttle quickly about 20% or more, it rattles and acts like the engine lugs. If I shift out of OD into D, it revs the engine right back up and doesn't rattle anymore, but if I stop and start moving again, even in D the rattle can come back. If I ease through the throttle I won't get the knock, it just seems to be right when it gets into load. The Overdrive seems like it needs some tuning as well, I'm not sure what I'll need to do yet, but it seems to shift in a little early at times. I'd basically rather keep it out of OD until I'm cruising. I'm running 32* timing but I'm going to check with Holley to see if there's some addition ignition tuning I can do. For now though, I'm happy to have been able to drive it after this much time! It's gotten tons of looks even just the few miles I put on it!
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Old 06-09-2017, 03:13 AM   #209
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Re: Project "You thought yours was bad!" '78 C10 Stepside

So I thought I'd throw a little update in here on how the truck has been coming. Unfortunately, I haven't really been able to drive it much. Another member on here very graciously let me use his tune file since he had a nearly identical setup and it had been dyno tuned. He can make himself known if he so chooses. The updated tune file worked great! However, I'm now getting the dreaded RF interference which has been found out that the Sniper unit is not properly shielded from, and is picking up electrical noise from the MSD magnetic pickup distributor, and essentially shutting the ECU down while driving. There have been a few suggested temporary fixes on the forums, but mine is still having issues.

Apparently the fix for these symptoms is to purchase a $430 Holley Dual Sync distributor and $25 adapter harness (plus shipping!), which uses a hall effect sensor instead of the magnetic pickup. I'm pretty upset to find this out after spending over $350 for my current MSD distributor, extra rotor, and extra cap needed to run timing control on the Sniper system, especially after calling in to Holley and them verifying that all my part numbers I intended to run would be compatible with their system. This is also after a nearly 12 week wait time to even receive my unit, when I was quoted 6 weeks max at the time of my order. I called in to Holley about my issues and they are currently refusing to discount a Dual Sync after all this trouble. I don't feel that I should have to eat the $350 cost of my MSD system AND spend an additional nearly $500 to purchase and ship a Dual Sync to solve an issue that they are responsible for. As of right now, I'm very disappointed in their service and I would be hesitant to recommend this system to anyone. I'm sure with the new distributor and getting things dialed in the last bit that the system would work as expected, but Holley's lack of acknowledgement to their issues and unwillingness to help their customers will definitely make me reconsider purchasing from them in the future.

However, it's not all bad news! I'll fill you all in on another project that I've acquired in the meantime. It's a 1968 Chevelle Malibu that is almost completely original, including the selling dealer paperwork, protect-o-plate, and original owners manual. It came stock with a 307 and a Powerglide, however the block has been changed out at some point to a 305. It was last registered 17 years ago, however, with very minimal effort it now runs and drives! I'm planning on fixing the little things it needs and making it a daily driver to go back and forth to work with.



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Old 06-20-2017, 08:03 PM   #210
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Re: Project "You thought yours was bad!" '78 C10 Stepside

I just read this whole thread. AWESOME WORK AND COOL TRUCK!!! I also love the chevelle. Id love to have it!!! I have a few chevelles and novas myself. One tip I wanted to share as far as putting a cam in that vortec engine. I use them quite often as I buy wrecked craigslist trucks all the time for donors. I just picked up a wrecked 02 yukon for 900, sold the 20in late model 20s for 1k . still have a good 5.3/4l60e for another project. ANYWAYS back to the vortec 350. I have run GMs got cam in them a few times. No need to pull the heads for machine work. You can buy a set of springs and modified retainers from Alex's parts for little over 100 bux. then you can run a cam with up to .550 lift with no machine work to the heads. they work great. I will share the link at the bottom. ALSO if you decide to upgrade lifters at the same time... DO NOT BUY FACTORY LIFTERS> get a set of ls7 lifters from gm performance parts catalog for about 100 bux. they work great!!!! here is the link to Alexs parts https://www.alexsparts.com/valve-spr...rf-hyd-roller/
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Old 06-21-2017, 03:19 AM   #211
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Re: Project "You thought yours was bad!" '78 C10 Stepside

Thanks! I really appreciate it! That's funny that you mention those retainers, I had a buddy point those exact ones out to me last week! I'll definitely keep them in mind for a future build, but as for this one, this engine rocks the truck pretty hard as it is, so I'm keeping it "stock" for now.

I did get a chance to swap out my coil/distributor setup for a conventional large cap HEI, which pretty much solved the interference issue the Sniper system is having. So I think I've pretty well verified that the Dual Sync will be the answer to my problems.

Anyway, since I'm on a standstill until I can get a Dual Sync coming in, here's some pics for you all to enjoy of the new wheels I picked up for my Camaro tonight!







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