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BB Squarebody Garage

169 members • Free

5 contributions to BB Squarebody Garage
Build a 6.2 diesel or twin turbo first gen LT1
Hey everybody — how’s your week going so far? Just wanted to check in and catch up. We’ve had about 20 new members join in the last couple weeks, so welcome to all of you. Glad you’re here. Now for the big update… The old 6.2 diesel isn’t hurt, but it’s definitely not performing like it used to. I think it’s time to either freshen it up or change things up completely. Here’s my dilemma. I’ve always loved the 6.2. It’s reliable, simple, and cool in its own way… but let’s be honest — it’s pretty lackluster in the power department. Option 1: Pull the 6.2, tear it down, rebuild it. • Roller rockers (maybe 1.6s) • Some head work • Cummins turbo setup • Upgraded injection pump • Fluid damper By the time I’m done, I’m probably $5,000–$6,000 into it on the low end. Option 2: I already have a twin turbo kit sitting at the house for a small block 350. It needs a little work, but it’s there. I keep coming back to the idea of doing a budget twin turbo LT1 build — like a ’95 Camaro or Corvette engine. There are quite a few around here. They’re already fuel injected. I could probably build the engine itself for around $3,000–$4,000 since I’d keep it mild — maybe 5 lbs of boost, stock bottom end, aiming for around 400 horsepower. People do it all the time. But… the standalone ECU and harness setup is about $2,700. So now I’m right back in the $6,000–$7,000 range. So what do you guys think? Do I: • Refresh and upgrade the 6.2 and keep it diesel? OR • Go twin turbo small block / LT1 and make way more power? I think the twin turbo setup would be way cooler and obviously way stronger… but there’s something about keeping the diesel too. I’m still going to make my own decision, but I’d honestly like to hear your opinions. What would you do?
Build a 6.2 diesel or twin turbo first gen LT1
1 like • 10d
go big block! even my mild build puts out a solid 410hp and 550 ft pounds but she drinks. boost for offroad is a finnicky option though with you being in snow makes more sense. I also love the 6.2s for there purpose but have always been tempted on building a hotter 6.5
oil tube o ring and retainer clip?
having a hell of a time finding the oil pain o ring and retainer ring part number for a gen 5 big block dip stick come out of the pan. any help would be appreciated
0 likes • 10d
@Justin Biddle while i have an 8.1 its going into a different rig. 8.1 are gen 6. Gen 5 is a tbi 454,427 or 366 engine i put gen 4 heads on.
AN fittings to fuel tank?
seeing if anyone has some insight to some AN adapters to the fuel tank sender fittings. working on putting a mild built big block in my jimmy.
1 like • 19d
@James Gabbard thank you got some fitting in the mail fingers crossed this big block will run before the end of the month!
0 likes • 17d
this fittings work with a direct sender works great for any one that needs em https://www.amazon.com/dp/B0FZCR5TSR?ref=ppx_yo2ov_dt_b_fed_asin_title
Bulk head
I've got a question for the engine side of the bulk head. What wire is what. Is there a good schematic for my 81c10. I can't go off my k20, it was methed with by tweekers.
0 likes • 23d
I would consider gutting and rewiring the thing. I usually oust the bulk head connector entirely. uni wiring kits have gotten fairly cheap and much better takes all the mystery out of other potential fail points.
Headers
Who has a big block 4x4 with Headers. Im looking for confirmation that late 60's to early 70's chevelle headers will fit a 73 to 87 square body and blazer. I know there's headers for the trucks, but i want 2" primaries which i can't find. Thanks
0 likes • 24d
I tried and its close on my big block could be cleared with a body lift. but had much better luck with truck headers. You could always just torch and bend them down if you are in a pinch and trying to make those headers work.
0 likes • 24d
no luck there for 2 inch sir.
1-5 of 5
Forest Johnson
1
1point to level up
@forest-johnson-3577
Got a fleet of squares beat on them all on one respect or another. Here to learn share ideas and of course the occasional rig photo

Active 4d ago
Joined Feb 13, 2026
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