Recent content by roundycorner

I need to replace/rebuild the 4.2 engine in my 90 yj. I will probibly go with the mopar injection upgrade. My real question is "do I rebuild my 253? do I build a 4.0 with the 4.2 crank and rods? or do I just use the 4.0 head on my 4.2? and if so what vintage is the best? If I do the latter ,I...