What do you think the most HP someone should have for a street drive?

[Rev]

There was a sign in an old speed shop that said: "speed costs money, how fast do you want to go?". When you go for more HP, normally aspirated, you get that power at a higher rpm and with less low end torque. Thus, you do trade drivability to get more HP. That means lower gearing (higher numerically).

The first thing you will need to decide is the CID or size of the engine you are willing to build. I'm assuming you will use a small block from 302 to 427 CID to go in the Fox body. If it was me, I'd try for a stroked 351 making 392. You can get that short block from Ford. Use AFR 185's and a single plane manifold with an 850 Holley or Demon. With the Ford roller cam that comes in that engine and long tube 1 3/4" headers, I think you will have about 450 HP. It won't be cheap though, so save your pennies.

Rev