Looking for a straight eight

straight 8

Seriously, you might try a salvage yard that has some really old cars or else an automotive museum. What are you going to put a straight 8 Buick in? They werent worth a hoot as a performance engine and had a real bad problem of breaking if you wound them up to anykind of a reasonable rpm.

I havent seen one of those since I was in high school (Class of 66).

If having all your cylinders in a row is your thing, I would suggest going with a big displacement I-6, like a 292 Chevy or 300 Ford.
They are both excellent engines, and would outperform that Buick with out even working hard to do it.

straight 8

One way to be really different would be to drop one of the previously mentioned 6 packs in it, or how about a Pinto or T-bird 2.3 4 cylinder? Or you could always go with an Olds quad 4, which looks a wee bit like an old Offenhouser 4 cylinder.