A vortec 5.7 is a lt1 based engine.
1/2 tons used the 4L60E transmissions in them. 3/4 tons used the 4L80E in them.
A pineapple grenade because you are about to mess up the 88 truck has a weak motor prob don't have as much power as the 305 vortec don't do it get computer and motor from a vortec to put in the truck
Under the truck, inside left side frame rail aprox under drivers door area.
From the factory, YES.
sounds like a fuel issue.
under the engine towards the rear of the engine On a 1997 4.3 Vortec it is located behind a plastic access panel at center front of truck (under radiator)
no sorry they are cast iron.
inside left side frame rail under truck
1, 6, 5, 4, 3, 2.
Bottom , rightside of the engine I believe .
If it is a vortec engine, then there is no timing ajustment. It's controlled by the computer
They are pressed in.