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Old 03-24-2019, 01:12 PM   #26
pbeguy
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Re: 1973 4wd to 2wd K5 Blazer Build

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Originally Posted by notsolo View Post
Looking good, big time savings having a 2wd frame to work with, that will save you a month of fab ing frame perches etc. I did the same, reused brake lines, they polished up nice. I did a 5.7 Tbi 4L60 with 273 gears it's a nice cruzer.
With the 2.73 does it actually go in to overdrive? I am wondering because my rear tires are 31" tall. On paper, I do not think a 700r4 will ever get out of third. I am probably going to use the TH400.
Love your Blazer by the way. Nice job.

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Old 03-24-2019, 09:37 PM   #27
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Re: 1973 4wd to 2wd K5 Blazer Build

Thanks for the comps....whole drivetrain was out of a 93 Caprice wagon. Definitely goes into overdrive, I still have a few bugs to work out, dash, bezel is also out of the same car, have not got the electronic speedo to work. Can't find the dash pinout for that car. Back to thinking it could be a ground wire...Your project is going to be sweet.
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Old 03-30-2019, 12:19 PM   #28
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Re: 1973 4wd to 2wd K5 Blazer Build

Do you have a picture of the surface conditioning disc you used on the hard lines? Or a brand name.
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Old 03-31-2019, 06:11 PM   #29
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Re: 1973 4wd to 2wd K5 Blazer Build

CRcrft, I happen to have a lot of Sungold Brand disc. They are the Roloc type. Plenty of similar brands out there. Harbor Freight has there own brand also. Just use them lightly and they wont break through the coating on the lines. I follow up with a scuff from a Norton Scotch-brite pad and clear them. The green disc is a 3M Bristle disc. It is excellent to clean with also.

I did get the frame moved to my storage to begin the process of mating them up.
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Old 04-07-2019, 06:56 PM   #30
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Re: 1973 4wd to 2wd K5 Blazer Build

Big day today. Got the frame bolted up and rolling on its on. It was way tougher than I expected. A lot of small movements and lining it up. I will be working on the motor and tranny next. Also trying to decide if I want to bag it. I am so happy I decided to use the complete 2WD frame instead of modifying the 4WD.
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Old 04-08-2019, 10:50 PM   #31
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Re: 1973 4wd to 2wd K5 Blazer Build

Put in a little work getting the inside cleaned up. It is as bad as I thought it was. The seats hid a lot of cancer.
Luckily, the complete rear floor and wheel wells from the donor are in great shape.
I will replace the bed floor and floor boards as needed.
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Old 04-21-2019, 03:39 PM   #32
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Re: 1973 4wd to 2wd K5 Blazer Build

Something bugged me about the way the wheel sat in the wheel well. I modified the new perch to position the axle 1 inch forward. It looks correct now. I am sure I will have to order a new driveshaft anyway because I am using the TH-400 for this build. It came with the yoke still in it.
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Old 05-30-2019, 07:31 PM   #33
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Re: 1973 4wd to 2wd K5 Blazer Build

Have not had time to work on the Blazer in a while. Got it pulled home this weekend so I can put in a few hours at a time. My before and after makes it worth the frame swap.
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Old 05-31-2019, 12:05 PM   #34
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Re: 1973 4wd to 2wd K5 Blazer Build

Looks great!
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Old 02-13-2020, 10:28 PM   #35
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Re: 1973 4wd to 2wd K5 Blazer Build

Seems like forever since I posted last. Got the engine pretty much done. Vortec heads with the valve guides cut down. Comp cam, lifters, springs and push-rods. All new gaskets and seals. Rebuilt Holley. Cleaning up the serpentine set-up to install. Going to tackle the transmission next. Found a guy that is willing to put it the TH400 back together for a great deal. Found some sheet metal for it. Still need a better tailgate.
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Old 02-16-2020, 05:11 PM   #36
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Re: 1973 4wd to 2wd K5 Blazer Build

nice build, will be following along....
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Old 02-21-2020, 09:12 PM   #37
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Re: 1973 4wd to 2wd K5 Blazer Build

I'm in too. The frame swap was a good idea to save lots of little headaches!
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Old 03-28-2020, 10:32 PM   #38
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Re: 1973 4wd to 2wd K5 Blazer Build

Started tearing down my 700r4 for a quick rebuild. I have an ATSG book coming and all the parts I will need. It already has some upgrades and I can not wait to mate it to the motor and get it installed. Also going to put a 3.42 disc rear in to the Blazer.
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