Cant say for the setup you got but with some dyno tests I have seen with a comp xtreme engergy mild grind flat tappet cam with around 218/224 @ 50 and a little less lift then that a 350 made around 340 plus hp with those set of heads with no port work done. The intake was a edelbrock dual plane performer. I would say you should have 325 to 350 easy. If you had world product sportsman II's and some better matching parts you could make over 400 hp easy. My setup is a 350, world sportsman 2's with edelbrock performer rpm, crane powermax hydraullic roller 284/292, 222/230 @50 with 513/ 528 lift. 9:2 to 1 CR with edelbrock 750 performer. Bottom end with flattop pistons and my block was decked etc to get me decent quench etc. My setup should make me around 400 or so. I had a super victor intake before and it was fine but after I went to a performer rpm I like the bottom end much better and did not really notice the difference too much on the top end. Like always you think your done with your motor and somwhere down the road you want to change something. It seems its always a work in progress.
Have fun on your build.