[saki302]

Definitely buy an SB100 car, you don't want to deal with the smog/reg issues yourself.

Owning an spf with a roush 427r/ RT AED 750 carb, I'd tell you.. get the 427SR, and put a cobra valley 650 AED carb on it if you like to cruise.
You won't miss the extra 50-60 hp. Mine runs quite well, but does like to rev higher, and the R cam likes a higher idle to feel nice.
My carb also has no choke/idle up, so the first minute or so after startup is a bit of a pain to warm the thing.
My next mod is going to be an idle up control for startup and track driving.