If it is a 383 CID then it probley has a carburetor on it. Remove the air cleaner and lay your hand over the top of the carburetor and have someone crank the engine over while they hold the gas pedal all the way to the floor. It should suck in on your hand at ALL times while turning over. If you fill fuel or air blowing against you hand then the timing has jumped. It should NEVER blow out the top of the carburetor, it should always be sucking in. NOTE- Be sure to unhook the coil when running this test. There is other ways to check this. but this is the easiest.
how do i set the timing for a chevy 350 small block?
16* bdc
Everything is different in that motor.
The timing chain and gears.
4 degree advanced, or BTDC.
4, to 6 degrees advanced, or BTDC.
Thay all did in the 80s
4 degrees advanced, or BTDC.
4, to 6 degrees advanced, or BTDC.
4 degrees advanced, or BTDC.
4, to 6 degrees advanced, or BTDC.
That means the timing chain and gears are worn out / to loose.