Im swapping out my 305 tpi for a 350 tpi a local perf. engine shop is building for me... Its a 350 with ported heads, ported intake, 10:1 comp, 228 int and 235 ex @.50 cam, the shop isnt sure if i will need to upgrade injectors and prom but by the sounds of what ive read searching here i do... I have talked with a local dynotune shop and they want $400-$500 to dynotune this car and i see that pcms for less is pretty cheap but what luck have u guys had with them and can they deal with as many changes are being made to this car... Thanks for the replies.