Time to clean up my mess

[TireSmoke420]

Ok so i dont know if any of you guys remember but a couple monthes ago i freaked out and did a buncha stupid stuff to my truck without throughly checking it all out. First i took it to one guy that said the number 7 cylendar had no compression. so i jumped to the conclusion that there was a hole burnt in the piston so i took it to my buddies house and ripped it all apart. i didnt compress air in the cylendars to see where it was not compressing from, i figured id pull the heads off and there it would be right there in front of my face. so now i actully have the mony to fix it. so now i got the truck back in my own garage i bought a stand and now i have the motor all torn down to bare bones. now i dont see anything in the pistons or any thing bottom end that wouldnt make it run bad.now heads confuse me so i dont really kinow what to look for there they look alright valves not obviously burn they are covered in soot though. so yea anyways guys help me build my motor. what cam should i upgrade to. i wanna upgradew the ignition system too what should i do there