Technically, you can factory swap it to a Volvo V6.
Good news:
They basically fixed every major problem the early B27/B280 engines ever had in late '87 built cars with the B280 engine.
It bolts right in there, it is a factory part after all.
200hp N/A with some mild reworking and a wonderful sound is possible without huge expense.
It likes boost.
It's shorter and lighter than the 4cylinder with a forged crank that basically lasts forever, with a timing chain and guides that last a really long time.
A good B280 will live every bit as long or longer than a redblock if maintained at all decently.
Bad news:
You essentially have only 1988-1990 (before they killed it off) 760/780 for an engine donor, and various 76-82 260 for everything else for a donor, most of which have not necessarily lived an easy life, never were terribly common cars, and have basically all long since hit the scrap.
Parts, as you can imagine, can sometimes be costly/difficult to find, though because the DeLorean guys have cars that are being re-made that are appreciating in value, at least there is *some* support too, but also raises prices on some of the stuff that is difficult to get new; double edged sword.
Manual transmission parts can be difficult to find, if you actually turn up the power any, don't expect the original M46 manual to last all that long.
The exhaust manifolds flow very poorly on the Volvo.
The USA B280F cylinder heads are not so great for flow either.
Less than optimal static compression ratio on USA B280 cars for N/A cars with more power in mind.
Neutral? news:
200 series cars only came with the 3 speed auto, though 700s had the 4-speed AW-71, would take some relatively minor work to fit it in a 200 series chassis and generally holds some power at all.
"B280E" heads/cams do nice things for power. Or eagle premier, but I think you need to use the B27/B28 timing cover with those to use the volvo accessories on a B280 lower case. The Volvo lower case and mechanical rocker arms you want.
Eagle premier/Dodge Monaco exhaust manifolds are way better than the "Volvo" ones, headers would probably be better yet.
One of 'em from a later Vette...
