I have a 71 c10 with a sbc 350 mostly stock internally. It's a 86 motor I believe I know its 80's. Stock bottom end I was told and I believe it. Stock heads are on it still have just been ported and polished. Not sure how good of a job was done, was done almost 2000 miles ago. Has a edlebrock intake manifold not air gap. Baffled edlebrock valve covers. Edlebrock 600 cfm carb. Has been cammed mild cam not sure of specs. My plans are to get a set of aluminum heads, local race shop recommended dart shp heads which are pre assembled. Can get either stiffer or softer springs. Quote was about 1300$. I am also looking into the skip white nkb 200 heads also pre assembled. Will be first motor I will be doing new heads in have worked on cars my whole life and am a diesel mechanic but skills and knowledge aren't a issue. I want to be able to have something to have fun in. Right now truck is just a tourqe monster. Has a th350 trans with a b&m shift kit in it also b&m trans fluid. Stock converter yet that is also on the to do list. Stock gm 12 bolt truck rear end with 3.73 gears. Just looking for options and good combinations. Plans are stall converter and step down to 3.42 gears and posi after motor is done. Want ideas for the motor. Heads, cam, head gaskets, etc. Looking not to spend a fortune. Want to do a fun but a some what budget build. Should I do assembled or bare heads. If bare suggestions of good valves, springs, retainers, push rods, and such. Also need ideas on if I should retrofit a roller cam and lifters or leave it flat tappet. Need suggestions on rocker arms. Just need top end suggestions all together. Thanks to all replies looking forward to hearing back.