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Old 01-05-2023, 07:10 PM   #1
Advanced Design
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2wd 1977 Blazer LS swap, mild drop….escalating

My wife and I decided we wanted a new project to update a bit before we jumped back into the 1948 Suburban build. My auto passion had taken a hiatus the last few years and has returned with a vengeance.

We started our search looking at several possibilities, only to be disappointed by untruthful descriptions from sellers.

Then we saw this blue and white 2wd K5 on a Friday. The Blazer had spent its life in the San Antonio TX area, had one owner since 1977 and was very clean. The seller provided great pictures, video and honest information. By that Sunday night we had driven 10 hours one way to bring “Garth” home.
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Old 01-05-2023, 07:16 PM   #2
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

Garth was as rust free and in probably a bit better condition than described. Guessing the first owner had been involved in the aircraft industry or hobby in some way based on the patch on the hat, aviators and unopened pack of Camel cigs left in the center console. I’ve noticed some of the fasteners have been safety tied like aircraft.
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Old 01-05-2023, 07:21 PM   #3
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

Garth, named for the original owner, was loaded up and hauled back to our place in Illinois.
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Old 01-05-2023, 07:22 PM   #4
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

Great looking blazer Doug..!!!
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Old 01-05-2023, 07:24 PM   #5
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

And 10 hours later on that Monday night we pulled into our shop. These trips were much easier to do 30 years ago!

And we will have more updates on the project soon. Our simple plan escalated just a bit.

Thanks for checking in!
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Old 01-06-2023, 01:29 AM   #6
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

'77's are cool and yours is very nice based on the pics. Following along as a fellow 2wd square K5 owner. Interested in seeing an under hood and interior shot before you start.
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Old 01-09-2023, 11:05 AM   #7
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

ditto! will follow along as well!... nice looking blazer!
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Old 01-09-2023, 02:23 PM   #8
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

What a great start! Nice rig.
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Old 01-09-2023, 02:34 PM   #9
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

Quote:
Originally Posted by mongocanfly View Post
Great looking blazer Doug..!!!
Thanks Greg! We are flying pretty fast on this one…..we hope.

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Originally Posted by Willowrun View Post
'77's are cool and yours is very nice based on the pics. Following along as a fellow 2wd square K5 owner. Interested in seeing an under hood and interior shot before you start.
Thanks Willowrun! Glad you are following along. For some reason we missed getting interior shots and will be sharing what we do have. Oops!

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ditto! will follow along as well!... nice looking blazer!
Thanks rodstored! Welcome aboard!

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What a great start! Nice rig.
Thanks Corts60! Your Burb is awesome.
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Old 01-09-2023, 02:41 PM   #10
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

We’ve had a number of Suburbans over the years though never a Blazer and are pretty excited about Garth. We put him on the lift to take a good look and determine the scope of the project / timeline we wanted to work within.
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Old 01-09-2023, 02:59 PM   #11
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

The smart move would be to finish the 48 Burb project and for a lot of reasons my head and heart aren’t into that one right now.

So, with the years clicking by quickly we decided to take this one down to the frame and use reasonably nice parts to build Garth back with.

Our aggressive timeline goal is to make the C10 Nationals in Nashville for 2023. We went last year in the 72 Burb and had an awesome time. Anyway going to be a challenge to make that we know. Will try our best.

First step was to organize the shop and storage shelves.

We did a little test on cleaning the hood. And Garth came with a replacement fender for the one that is bent, likely from a tire and wheel coming off when driving.

Here is the only interior picture we have right now.
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Old 01-10-2023, 12:54 AM   #12
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

That's a really nice Blazer!! I miss our '87 Jimmy we had.
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Old 01-10-2023, 12:07 PM   #13
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

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That's a really nice Blazer!! I miss our '87 Jimmy we had.
Thanks lower!

Once the shop was organized we started disassembly and of course bagging and tagging parts / bolts.

The control arms were coated in what appeared to be dirt, tar and concrete. Took a hammer and chisel to remove what ever is on them.
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Old 01-11-2023, 12:23 AM   #14
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

Wow, clean underside and the replacement front fender in proper color and trim is crazy. That's what dreams are made of right there.

Has the suspension been planned yet?
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Old 01-12-2023, 07:10 PM   #15
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

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Wow, clean underside and the replacement front fender in proper color and trim is crazy. That's what dreams are made of right there.

Has the suspension been planned yet?
Yeah, Garth has the right stuff to be a nice one.

The suspension has been planned out and we won’t be using the original control arms nor spindles.

We found a 6.0 and 6L90E on FB marketplace and headed down to Evansville, IN the same day to pick it up before someone else beat us there.
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Old 01-14-2023, 04:38 PM   #16
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

We cleaned up the engine, did a cam, valve spring and oil pan change, then painted the block black. The aluminum parts will be left in natural finish.

We had friends over for a shop day doing the engine updates and removing the body from the frame.
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Old 01-14-2023, 04:43 PM   #17
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

With the extra help lifting the body and placing it on the body cart went smoothly.
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Old 01-15-2023, 03:38 PM   #18
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

those outdoor pictures dont look like Illinois in Jan..!!!!
yall moving pretty quick on this
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Old 01-16-2023, 04:23 PM   #19
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

Nice work so far! having a tractor helps a lot, must say I'm jealous.
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Old 01-17-2023, 02:36 AM   #20
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

Clean Blazer.. great find!!!
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Old 01-18-2023, 12:58 PM   #21
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

Quote:
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those outdoor pictures dont look like Illinois in Jan..!!!!
yall moving pretty quick on this
We have had a decent run on temperatures aside from one cold snap this winter. Way better than the blizzard we had during the “Wire and Fire” event four years ago today, huh Greg?

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Nice work so far! having a tractor helps a lot, must say I'm jealous.
Thank you! The tractor has been incredibly handy and has made some difficult tasks fairly easy. I need all the help I can get!

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Clean Blazer.. great find!!!
Thank you! We really are enjoying this build with this solid of a start.

Once we had the body off the frame we hauled it outside for a good heated power washing. Lots of Texas dirt, engine oil and what appeared to be tar or undercoating covered the frame and suspension.
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Old 01-18-2023, 01:18 PM   #22
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

We continued disassembly down to the frame and suspension crossmember.

Grandson helped us load components to run to neighbors farm to use their hot pressure washer to work on removing more gunk. He also helped remove some of the riveted on brackets and received a grandpa level class on how to do so.

The original frame wax is in good condition.

Then we dropped the frame off at the powder coaters and really didn’t like leaving it behind.
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Old 01-18-2023, 01:36 PM   #23
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

G-kids sure have grown..!!!!!
I assume it's the same ones..
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Old 01-20-2023, 12:32 PM   #24
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

Nice!
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Old 01-22-2023, 05:09 PM   #25
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Re: 2wd 1977 Blazer LS swap, mild drop….escalating

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G-kids sure have grown..!!!!!
I assume it's the same ones..
Yep, same ones and they are really growing up. He is taller than me now.

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Nice!
Thanks Evan!

After steam cleaning, the rear diff was better though needed wire wheeling which was done outside due to the continuing decent weather.

The pinion seal was leaking so I ordered one from local Napa store. The replacement was designed “thicker” and placed the seal deeper on the pinion flange. Had me a bit concerned though that part worked out ok. Throwing me off was this video about the pinion seals I had viewed….. https://youtu.be/eX-1MUTVnQ8

What didn’t work so well was when retightening the pinion, I went past the locations marks I made on the pinion gear snout, pinion flange and case. This crushed the sleeve more and increased the pre-load on the pinion gear bearings too much. Bad on me…..and the Milwaukee battery impact…wow did it move the nut quickly.
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