i'd still recommend big block. 600+ stroker will get that kind of HP at 5000 rpm's. on street gas.

why push the smaller engines to their max limits and shorten their lifespans just to say "i did it" ... not to mention spending thousands to get forced induction done right, or thousands for small block head work done for max flow when big blocks already flow more with light porting or out of the box with no porting at all.