first check to make sure your fan comes on. if it does then there are several things that could be wrong. first do you have enough water/antifreeze in the radiatior. check to make sure you have no leaks. then replace the thermostat located in the top radiator belt housing connected to the motor. if it still overheats try replacing the water pump. if it still overheats after that check your oil to see if theres water in it if there is you blew a head gasket
Tarns
There is no Chevy 4.3 V8. The 4.3 is a V6 followed by a 4.8 V8
Either a 4.3L V8 or a 5.7L V8
Yes
No.
4.3L 265 V8 and 5.7L 350 V8
V8
If you will look on google under "1994 v8 jimmy" you will find someone who has a car done just as you ask for sale.
9,225
350 cubis inch
Tarn
depends on the v8 and the transmission really, but it is not a good idea. v6 tranny was not meant for the torque and horsepower of a v8.