You just can't expect to make huge amounts of power with stuff like this, but adding a small turbo or supercharger to overcome the really crummy head flow of a 235 would wake it right up. I just wouldn't go for more than 6 pounds of boost or you can expect to be ripping the studs out of the head and replacing a lot of pistons.
Don't ever expect to beat a well tuned SBC, though, there's a lot more refinement on head design and rod strength on those.
