I have a 86 trans am, with a carb. 305 in it. Its all stock because I know it pretty much pointless to put money into a 305. I have a 350 Im building In my garage and need to know some of the mods I need to get it to work in my car. I also have heads for the 350 too. Any input would be greatly appreciated.

I would just run a non-cc carb, and get rid of all the engine controls and computer stuff. You will also need a non-cc distributor. Other then that there is no difference. Or you could just swap all the sensors, controls, carb, and distributor you have now on your 305.

How would I take out the computer controlled stuff and make it work. I know you would have to change it to vaccum advance, but how would I do this. I know this may be a basic quesiton, but I have no clue how I would do it.

If one don't know how to tune in a carb or timing, then it's kinda good idea to have a computer do it for you. That's some of the reason they started with computer controlling in th first place.