• Hello Guest, we are proud to now have our Wiki online that is completely compiled and written by our members. Feel free to browse our Jeep-CJ Wiki or click on any orange keyword when looking at posts in the forum.

4.3 swap or 4.0 head

4.3 swap or 4.0 head

Rippin

Jeeper
Posts
125
Thanks
0
Location
Tavares, FL
Vehicle(s)
1983 CJ-7, 4.2, T-5 & Dana 300, D30 and AMC 20
Doing some research for when I start my rebuild next year, and I'm looking at engine options right now. I have a AMC 258 i6 / 4.2l that's got a decent amount of blow-by goin on, so it needs a rebuild. wheni rebuild I'll also do a 4.0 head, and port and polish it unless i hear that it's not very beneficial on those heads.

My other option is a late 90's, maybe early 2000's blazer that my father in law has with a 4.3. I have a T-5 in Jeep now, so if that'll bolt up to the 4.3 that would be ideal.

I'm undecided between the 2, looking for opinions on the 2 setups. I'll have to be spending money on the rebuild of the 4.2, so im not opposed to spending comparable amounts to swap the 4.3 in if its the better choice of engines.
 

Jeep-CJ Donation Drive

Help support Jeep-CJ.com by making a contribution.

Help support Jeep-CJ.com by making a contribution.
Goal
$200.00
Earned
$0.00
This donation drive ends in
0 hours, 0 minutes, 0 seconds
  0.0%
Back
Top Bottom