Originally Posted by Hewfil1 (Post 7719913)

Gregski, is it a 4160 or a 4150? You mentioned 4160, then later 4150. I'd like to know as I might decide to go with this rather than the $400 Edelbrock I was looking at. As I also have a 1974 GMC with 350ci V8.

Originally Posted by Will206 (Post 7719868)

Yea, you need a 7/8-20 adapter to I think 3/8. I don't know if it's inverted flare or NPT though.

I just went though this because I converted everything to black anodized AN fittings, and I literally just took a second freelance Webdev job to afford this stuff.

Also, I decided to go with the Quickfuel Slayer 750 on my 383, it seems to work great so far.

Originally Posted by Gregski (Post 7719924)

I bought it as a Classsic Holley 4160 Part# 0-80457SA 600 CFM but I converted it to a 4150 using their kit.

If I had to do it all over again I would have bought the 4150 model Part# 0-80783C also a Classic Holley.

both have vacuum secondaries

both have electric chokes

but the 80783 already comes with the center hung float bowls with the dual inlet, the only thing it lacks is the sight glass in the fuel bowls, and it is made of heavy Zinc instead of light Aluminum, but still a better carb

if price is a deciding factor look for these on eBay sold by Holley Performance as referbished you can get them for under $300 and they are done by the Holley guys / factory (dang it I just gave away my secret)

here's a pic of the better 80783 4150 style carb

Originally Posted by Hewfil1 (Post 7719944)

Would you be willing to send me the entire parts list in a PM? Or in the thread. Or just go with the 4150 over the kit? My choice right now is between this and the Edelbrock 14063 (noNEGR)

Originally Posted by Hewfil1 (Post 7723755)

Can't wait to see how she's running with the new parts.

Originally Posted by Gregski (Post 7724579)

Oh My God, after weeks and weeks of tuning SHE is a BEAST bro, runs strong, always did, but now strong and smooth.

Just yesterday a new larger .035" accelerator pump nozzle aka "squirter" fixed the delayed Vroo Vroooooooooooom when you floor it in neutral, now it is nice and smooth throughout the RPM range

A lighter tall yellow secondaries spring fixed the hesitation upon acceleration when in gear (the carb came with a plain spring), now that's smooth.

She wants to run bro, I get that feeling she's like a Filly that can smell the fresh cut grass on the race track and just wants to run!!! So Cool

Driving Rusty to work every day this week just to shake out any sillyness.

I just need to fix the exhaust leak [AGAIN] and she'll be ready for another Dyno Test straight after Pay Day next week, ha ha

Originally Posted by KQQL IT (Post 7623384)

http://67-72chevytrucks.com/vboard/a...1&d=1465770796

Looks like a gasket problem, not a header problem.
Round port gaskets may have corrected that leak.

Originally Posted by Gregski (Post 7623231)

so there was no more ticking sound but the truck sure did sound funny with headers and a Flowmaster on one side and an exhaust manifold and a Turbo muffler on the other, there sure is a difference in sound between the two sides that's fer sure, and I won't tell you I may could have liked the sound on the manifold side, since I must justify my header expenditure, ha ha

so back to the parts house I went looking for some crusher gaskets, only to come away with these beauties that set me back $35 bones

how in the world they is reusable I'll never know

so did I put them on? Um no!

wait what?

I wanted to put them on, but those Felpro manifold gaskets were stuck to the enjin block and I didn't feel like scraping brand new gaskits off, then and there, so I said what the hewk lets give them a go with these them headers, and guess what they worked beautifully, SNMFT - Still No More Frustrating Ticking

so overall it was a good day, I fixed my truck, and my countrymen beat North Ireland in an Euro Cup 2016 match, what? you don't pretend to be a soccer fan every 4 years weather you need to or not?

Originally Posted by 68Timber (Post 7717662)

It looks like the flange is the problem, not the gaskets. The round flange with square gasket ports isn't giving much of seal in the corners. If you built up the corners with your welder and smoothed them with a flap disc you'd have more surface area on the gaskets all the way around.

Originally Posted by RDrancher (Post 7725532)

Remember this post Gregski?

Originally Posted by RDrancher (Post 7728936)

Not enough bark with the Magnaflows?

Originally Posted by Gregski (Post 7729017)

Correct, I need to skier little children when I drive by, ha ha

Originally Posted by RDrancher (Post 7729438)

Then you might as well rig up the spark plug flame throwers while you're at it. I would suggest relocating the exhaust exits though. No fun when you realize that the burning smell is in fact...you. :D