I keep doing and re-doing the math, building up the 250 vs. swapping in the 4.2, and every time the numbers come up in favor of the 4.2.

Oil pan doesn't bother me. Limequat's Supra build illustrates that well enough. Doesn't seem like that big of a deal.

Wiring harness could be ugly, but again referencing Limequat's build, doesn't seem that horrible. Certainly not bad enough to make a fella throw in the towel.

I have my eyes out for a local donor. They must be pretty popular, or in low supply around here, because the ones that end up in the junkyard are stripped bare in a matter of days. When I say stripped bare, I mean down to the body shell. These people aren't leaving a scrap. I've never even got a sniff at a motor, yet.

Thanks for the link to those pics, Beater. Would be cool if we could get some shots of the frame/crossmember mods and engine mounts. That's what I'd really like to see on that turbo firebird build.

Found a fair looking LT1 in the classifieds. Was tempted for about 0.6 seconds. Too easy. 350 Camaros are more common than dog exhaust.

Limequat, I went to your web site and all it said was the domain name was reqistered with no info. How do I get to your web site

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Now, 510 hp at the wheels is totally cool. What is that 575-600 at the flywheel? I'm assuming that's with pump gas too. For most people, that's probably a little excessive, but I'm guessing you're never satisfied.

94 octane pump gas. 8 PSI on a stock 4200 is darn close to 400 HP.

This year the drivetrain upgrades will be completed, the 4L80E is built and waiting to be installed, the dana 60 went in last year and is now well broken in.

On 94 octane I can only run 10* timing at 10 psi. With alky being 130ish octane I bet the timing can go up over 30*.