Hmmmmm, 198 issues

Sounds like you want a nice driver. But what else do you want? Burn outs, limited traction in first gear? If you have power aspirations beyond that of a modern commuter car, I would go V8(big block IMO).

If you want something to tinker with that will run decently enough to keep up with modern traffic keep the slant. I’d go with the Aussie speed mid length 2 bbl manifold, Holley 500 2bbl,dutra duals and at least 3.55’s out back. With a solid 10:1 compression and a cam over .480 lift. You have a reliable 200 HP and 250+ ft lbs of torque.

This is just my opinion, I grew up building slants and have a fondness for it. But the reality is it’s easier to go faster with a v8. If your Steve McQueen days are over, and you just want to cruise out he slant is a sweet little motor.