Will a 350 out of 92 Silverado fit in 88 Cheyenne original had 350?
A 350 block is a 350 block, the only difference will be the some of the hardware, i.e. Intake and exhaust manifolds types of accessory drives things like that.
Alright so from the 88 to 93 how will the connections be? Will they match up?
No, you will have to put the 88's systems on the 92 motor.