Im building 89 Wrangler YJ. (sit 7 years under the tree) It has 4.2 AMC 258. Its running now, but its very tired. So im gona stroke it !
So i have complete 4.2 AMC 258 and 88 4.0 from XJ.
Idea:
4.2 3.895" Crank. - problably needs machining.
4.2 Rods. - have them cheked
sealed power 677 pistons .030 over
New rings,bearings etc.
New injectors.
Stock head (DIY port it? ) , intake , exhaust. Bore TB.
Im aware of the big quench problem but for me to order custom pistons and use 4.0 rods is out of the game because of the cost.(shiping etc.)
I dont see detonation problem an issue because we have high octane fuel.
Machining is cheap- i can deck it down .040 ? shorter pushrods?
So my question is, what cam i should buy for this combination ?
Closest dealer is selling Melling MC809 - so this would be the cheapest option. But im willing to go the right way.
And i know. HO engine would be nicer, but in europe we dont have junkyards full of 4.0HO-s so it is what it is. ( Had do buy full XJ to get this engine)
Im not looking 300HP monster. Just a little HP boost with stuff i already have.
Sorry for my bad english , and thank you for this community !
Few pictures if someone cares: