If you got the car cheap, the drivetrain cheap, and did a lot of the fabrication and installation work yourself, you could come out some $$ ahead. That's if, IF you can find that rare buyer who wants the car, and at a price where you do in fact, come out ahead. It might sell for $10k, tops, probably less.

This is coming from a guy who has a superbly done Volvo V8 conversion (CA smog legal LT-1 with 6-speed), but a few modest selling initiatives have failed to turn up a decent offer. No worries, fun car, I'll keep it.
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Bob: Son's XC70, my 83 240, 89 745 (V8) and XC60. Also '77 MGB and some old motorcycles