stroker kit is the best VFM, but some magnum heads are probably the eaiser route to take....
some ported magnum heads with roller rockers on that bottom end with that cam and an appropriate intake and carb would make about 375. but it would be all uptown, that kind of set up doesn't start to wake up till about 3K and gets choochin' about 4500
conversely, the stroker would make about the same power overall, but more power by a wide margin and at 1000+ rpm less