i have a 93 chevy 1500 2x4 my question is the engine is a vortec with a after market edel brock multipoint fuel injection 3505 that uses the stock tbi i just need to no if the timing chain covers are the same for the 93 5.7 and the vortec engines i cant seem to get it in time i unplug the wire to time it to 0 but it runs like crap so if anyone can head me in the right direction i would appreciate very much thanks