Sorry a thread already covering this probably already exists but I might have a good deal on an lt1 and down the line would like to v8 swap but debating getting this for a good deal or waiting for a clean 350 down the road. the lt1 im looking at is from an 92 corvette. I have a 2.8l v6 auto and here are some questions I have about the lt1 swap?
1. Can i use my stock tranny on the lt1?
2. Is there anything I could use from the v6 on the lt1?
3. What the difficulty level of a swap like this?
4. What's the price range im looking for this swap low being marketplace finds and it runs and high being tidy neat and "long lasting" excluding engine and presuming most if not all engine wiring harness from purchase?

Thanks in advance

 

Yours is the 2nd-most-often-posted thread on this site. This sticky will answer most of your questions, other than those relating to an LT1:
V6 to V8 Swap - READ BEFORE POSTING NEW! - Third Generation F-Body Message Boards

LT1 Specifics:
Common LT1 Swap Questions And Answers - Third Generation F-Body Message Boards

Personally, I'd stay away from the LT1; its ignition system, for one thing, was a problem even when those engines were new. Others here will have a different opinion, and that's OK. If you go with that engine though, good luck.

Concerning 'difficulty' and 'cost,' that's entirely up to you; I can't offer any insight.

 

Doing an engine swap from a v6 is a full on deal. It's not a massive deal but will be a little more work than a car w a v8 (potentially). You will be swapping everything from the v6. The engine/fuel system, trans, accessories/dash and likely(maybe) front springs and lots of other stuff.

personally, I wouldnt swap in an lt1 from the 90s d/t ignition as was mentioned prior. Also it has limited support. If you want to swap in a sbc just use a normal one. You could get used stock parts to make the swap less expensive and a little more straight forward. You are doing a full swap, you will be doing the same work here as a LS swap so at this point, consider a LS motor. Either way I'd run a standalone efi system like a edelbrock pro Flo or Holley. They make the swaps so much easier. You're gonna need a new trans/drive shaft also.

I swapped a zz4 in my car 25 yrs ago and used an old pro Flo system then, It was pretty simple. I upgraded everything a couple of years ago and the new pro Flo 4 systems are really awesome. They control things like fuel pumps and fans. I'd keep an open mind to what engine you put in. There's far more support for a regular sbc or LS and your swapping everything so an LS swap isn't more work. I have a fast SBC and am happy w it. I'm not jumping on the LS swap train but many have and for good reason.

 

Thank for the help guys, yea if its around LS levels I'd just be better off waiting for a sbc i know pretty much what id need to do for that swap. Thanks Again!

 

1. No
2. Nothing between the AC condenser and the drive shaft, except maybe a few bolts
3. What's the level of difficulty of brain surgery, to a brain surgeon? Would you want ME rattling around inside your skull with sharp tools? Would you do that to someone else? This question is ALOT like that. Seems to me though, it's in the "if you have to ask" category. Which is to say, for YOU, it'll be difficult. Otherwise YOU wouldn't even be asking in the first place. If you had any experience with swaps in general you'd already know what to expect.
4. Can't answer that. Try car-part.com and The Google and see for yourself.

IMO the LT1 is one of THE ABSOLUTE WORST choices that there is for a swap, in 2025. It's ALREADY an antique; it retains many of the design features of the 1955 (barely post-WW2) SBC, such as paper gaskets, head bolts into the water jacket, 5 head bolts around each cyl, 2 exh ports together at the center of each head, etc. etc. etc.; there never were very many of them to begin with, meaning, that any kind of parts availability has NEVER been very good, and into the future is gonna do NOTHING butt just get worse; it's relatively "fragile" in the sense that it has significant built-in weaknesses, and I don't mean the mechanicals so much, butt more the electronics and that sort of thing; and it took the technology of the day (think back to what your cell phone looked like in 1990) to its ABSOLUTE LIMITS, and maybe even a little beyond, which further adds to its "fragility". While it was a TERRIFIC motor in 1991, arguably one of the BEST available in that moment as far as how it ran, that on its own does NOT make a good candidate for a swap.

Not sure what "92 Corvette" has about itself that's so attractive, more specifically, anything that makes it any different from any other LT1, except that it would lack some of the hard-learned lessons from experience that were updated in the later models. You know what they say... my good judgment comes from experience, butt my experience all comes from my bad judgment. A brand-new engine design follows that same trajectory. And on that PARTICULAR motor they made ALOT of design decisions that turned out VERY poorly (*cough* OptiSpark *cough*) and required re-design, which the early ones either won't have, or their PO would have had to upgrade them, or YOU will, otherwise you'll continue to enjoy the effects of the overly optimistic engineering at the time of its introduction.

I'd suggest doing some serious research first. Start out with stuff OTHER THAN "what's the cheeeepest one I can get"; like, look up different parts you might need, going forward (ignition, connectors, sensors, and above all, ANY pieces unique to the LT1 such as the water pump), and see what the lead time for ordering it is, how much it costs, etc., then come back acoupla months later and see how it's changed; and figure out if you're willing to ride that trend into the rest of the future of your ownership of this vehicle.

Seems likely, if you're honest with yourself, that you'll quickly realize that it's not A Good Idea, and it'd be ONEHELLUVALOT smarter to swap in a LM7 pullout or the like.

 

Just keep in mind v6 swap to v8 swaps are kind of the same amount of work any way regardless of the v8 swapped in. You have to remove and replace the whole drivetrain less the rear. The wiring harness/fuel sys is all different. You will need to get all the parts for a LS/sbc either way. Yeah, you can get used f-body parts but there's also massive support for LS parts. My point is, you're putting in the work either way. Yes, there's a more clear path for a sbc swap but your gonna be doing the same amount of work w any other engine swap. There a bit more research and planning w different engines though. Just think about what you want in the end and what's your budget is.

getting a pullout Ls and a standalone efi system w a t56 would be pretty easy to get going, but not the least expensive path.

 

^^^ This ^^^

And I would add, the EXPENSE ($$$$) won't be all that much different either.

A 1955 SBC, LT1, or LS will ALL take essentially the same effort. The cost of the engine will vary dramatically depending on whether you buy new, rebuilt, or used; butt no matter what, will probably be less than the cost of installing it, except in the case of a new one. You're going to be buying a whole transmission, a whole new exhaust, all the accessories (PS, AC, alternator, etc.), a whole cooling system, all the wiring, any computer that might be required, a whole fuel system; concentrating on "it'll cost $2000 for a complete LM7 pullout butt I can get this rebuilt 350 for $1200" misses ALL of that.

IMO your priorities should start with FUTURE PROOFING. Under no circumstances do you want to go through all the effort, expense, and risk, of executing a swap like this, and end up with something you can't maintain. By "maintain" I mean, go to the corner parts store and get ANY part you need, and find it either in stock or available for pickup overnight in case they sold an unusual lot of em that day and ran out. You DO NOT want to be in the HELL of discontinued critical parts, waiting for the next mfg run, supposedly "superseding" parts that don't work, etc. etc. etc. The LT1 will put you right there.

The LT1 has never really been a good choice for a swap except maybe for a few brief years in the mid 90s, let alone EVER being The Best. The traditional Gen 1 SBC was hands-down THE BEST motor for a swap, back in the day. That day is OVER though. While it's still "OK" enough if your standards aren't too high, the LS motors are VASTLY superior in every way. They're newer, meaning all their replacement parts will remain available farther into the future; they're plentiful, since there's MILLIONS of em out there (unlike the LT1), especially in trucks; they're CHEEEEEEP, for that same reason; they are MUCH longer lasting, individually, than the old SBC (which the LT1 retains most of the worst features of), since everything about them is just more reliable overall (better gaskets, 6 main bolts instead of 2, better valve springs & seals, everything is just ...BETTER); you can find used ones all day long that need absolutely no repair work whatsoever before dropping them into another vehicle; they're FAR more efficient (gas mileage), usually; they're just ... BETTER in every way. Any difference in up-front cost will DISAPPEAR after only a few tanks of gas.

Think it through carefully before spending your hard-earned cash on turning your car a driveway ornament.