If you have the $$$ consider a converersion to a 5.0 litre Ford Mustang V-8 or a Chevvy small block like a 350 V-8-it's a good way to get the power you are looking for-there are websights that give info-this is a popular conversion-but you are looking at $10,000 minimum.

There won't be any wiring problems with ANY B230FT engine, as long as you take the sensors from your engine and put them in the new one. Just peel back the intake manifold & wiring harnesses and yank the thing out. Then put in the new block and bolt all your stuff up--that's it. Done it before, no problems. Quick & easy.
--
1992 940 wagon, 72k
make people envious; smile often.

I don't think '92 is a watershed year. In late 94 or 95, the final iteration of the B230FT got the piston oilers and that version might be the ultimate Volvo 4 cylinder engine. Go to Turbobricks.org and look for the commentary by Mike Aaro who runs a Volvo performance engineering place in northern Sweden. The blocks are not exactly plentiful yet, but second place might go to the 90 and newer post-K blocks you are referring to. I think if yours was made in late 89 it might be post K or do you have a K sticker on the timing belt cover? I think the first K's appeared in '88 (late 87 manufacture).