help with a 383 cheby

Got a friend running a 383 chevy in an S-10 blazer with a tuned port setup on it, and its just enough as far as airflow is concerned, and thats a performance minded intake setup. You may be able to get by using a bigger throttle body off a 454 same year as your truck and put your 350 injectors in it, get an edelbrock tbi intake and port the snot out of it, and port match it to the larger throttle body base. This may help airflow with a 383.

Ever try adjusting your timing to make your350 a bit more aggressive, maybe a cam, and headers? Chuck the engine driven fan for an electric.

I did those things to my 94 C1500 silverado and she runs much better now. Not a bullet mind you but she gets 22 highway. 350, 5 speed 3.55 gears w positraction.