ill agree with the 274h, thats what i am using for my 360, j heads.
bringing in the engine tomorrow to get the machining done, heres what i'll end up with
kb107 pistons zero decked
ported j heads-valves back cut
comp cams xe274h-complete k kit, $430 but you get everything
eddy air gap
650 holley vac secondary
k&n
headers
2.5 exhaust with h pipe
727 with shift kit
8.25 rear with 3.55 sure grip
it should be reasonably streetable and run some respectable hp numbers
i think you would be happy if you ran something similar