A little more power out of my 350

I have a 1955 chevy step side truck. It has a 10 bolt rearend 343 gears a 700r4 trans. I think the torque converter is a 2900 stall my reciept say's b29 hs. The motor is a 350 4 bolt main 1 one peice rear 4088548 forged crank stock rods ARP bolts trw pistons 30 over. heads are stock 3927185 junk heads edelbrock performer intake and edel 600 cfm carb. I would like some more power out it its just a weekend driver it runs great but a hot rod should have a little more power i think. I do have some parts i have a rpm air gap manifold i have a set of comp 1.5 roller rockers and a edelbrock cam 7102 .488 intake .510 exh lift. from reading on here it sounds like heads would be the best thing i can do to it. 350 to 400 hp is what im looking for. any help would be graet

a 100 nitrous shot will fix that

I dont want to run nitrous just want to hit the gas and go. im still looking for the cam specs thats in it know. If i remember it was supposed be good for 350 hp but i dont think im getting that maybe because of the heads?

Heads are key to making power and those heads are holding your engine back. I would suggest upgrading to a set of good breathing heads like RHS Vortecs (iron) or Edelbrock RPM heads (alum) if you are on a budget. If you are not on a budget, look at AFR 180's.