I WANT TO PUT A 4.3L IN MY JEEP TO REPLACE THE TIRED 2.5L I ALREADY HAVE A DANA 44 UP FRONT AND A FORD NINE IN THE REAR ALL WIT MOLY SHAFTS, LOOKIN FOR INFO ON GOOD DONER VEHICLES TO GET A TURN KEY ENGINE AND TRANY COMBO (GOING WITH AN ATLAS TO TAKE CARE OF THE U-JOINT COMPATABLITY /OUT PUT LINEUP ISSUE) ANY HELP OR POINTERS WOULD BE APRECIATED.

The 4.3 in my 8 came out of a '93 S-10 Blazer 4WD. The p.o. did the install so I'm not much help there. He also swapped in a TH350, but I think some s-10's had the 700R4, not a bad tranny plus ya get overdrive. For cooling I use a stock jeep radiator and a 2 spd ford Taurus electric fan and have never had a cooling problem, even on 100* plus days. As far as a "turn key" application, good luck unless you spend the big $$ through a custom company, whatever donor you find make sure you can get the complete harness w/comp and accessories(starter, alternator, etc.)HTH

THANKS FOR YOUR HELP, ARE YOU HAPPY WITH THE HORSEPOWER OR DO YOU WISH YOU HAD GONE BIGGER??

I AM ALSO CONSERNED WITH THE FLAMABILITY/ OVERHEATING OF THE AUTO TRANY I HAVE A TENDENCY TO SPEND ALOT OF TIME UPSIDE DOWN AND THE STICK IS A NO BRAINER ANY THOUGHTS FROM ANY ONE.

I'm very pleased with the torque and power, I've run 33's, 35's, 36's, 38's, and now 39.5's on the same motor and it's pulled all of them well. When I made the jump to 38's I re-geared to 5.13's also. There are times now when I'm really bound up on the rocks when there's almost not enough power to get it through, nothing that a 4-1 t-case won't fix though For the type of wheelin I like, gearing is more important than hp. More power would just have me breakin' more stuff, lol.
In 6 years of running it I've never had an issue with my TH350 overheating, I've got it plumbed through the standard ports on the radiator and it goes through an external cooler as well. Haven't been on my lid yet so I don't know about leaking/flames..hopefully I won't find out either, lol.