HOrnbrod Posted June 23, 2015 Share Posted June 23, 2015 http://www.summitracing.com/parts/edl-50169/overview/make/jeep Link to comment Share on other sites More sharing options...
RescueDuck33 Posted June 23, 2015 Author Share Posted June 23, 2015 Hornbrob so that would be your choice, do you have one or know someone with one on the 4.0? Link to comment Share on other sites More sharing options...
HOrnbrod Posted June 23, 2015 Share Posted June 23, 2015 Some folks over on the strokers forum are using them with good results so far. I'm thinking of pulling the plug on one too for my stroker. But for a N/A stock engine like yours, I'd adapt the 7120 casting head. With a little port polishing, it'll flow well and you'll never have cracking problems again. The TUPY head would be fine too if you can find one. And the new Clearwater heads have great reviews and are economical. Link to comment Share on other sites More sharing options...
RescueDuck33 Posted June 23, 2015 Author Share Posted June 23, 2015 7120 is that a direct bolt on. I'm ordering a header to replace the stock have found a tupy and a 7120 head. Link to comment Share on other sites More sharing options...
HOrnbrod Posted June 23, 2015 Share Posted June 23, 2015 I used a ported and polished 7120 head with the older cast aluminum cover because I could bling it out a little bit. :yes: It's a direct bolt on except for the few little things Rockfrog mentioned above. Link to comment Share on other sites More sharing options...
Rockfrog Posted June 24, 2015 Share Posted June 24, 2015 The only difference between block and head mating is the 0331 incorporated locating dowels, the use of a couple studs will solve that (I made mine from a pair of old head bolts the first time I swapped a head, didn't bother after that one though - I also put a 7120 on my 88 Renix block). The head mating surfaces are exactly the same, the block you have may even be as old as 98 or more. The only thing you have to sort for sure is the exhaust manifold end of things going with the 7120 head. Put the 7120 next to the 0331 and you'll see why. Was the best peace of mind move I made back in 05 when I dealt with this issue, been going strong ever since. Also had the added benefit of letting the engine breathe better (the 2000 stock use to "wheeze out" on the highway, after it kept pulling right to recline - yeah, I was younger then). Link to comment Share on other sites More sharing options...
RescueDuck33 Posted June 24, 2015 Author Share Posted June 24, 2015 What's everyone's opinion on the Clearwater new 0331cylinder head with int 2.02 EX 1.62? I can get it for 550-600. Link to comment Share on other sites More sharing options...
RescueDuck33 Posted July 7, 2015 Author Share Posted July 7, 2015 Well update. Motor back together with all the upgrades and she sounds and run great. Couldn't be happier with how it turned out. Now back to the MJ build. Link to comment Share on other sites More sharing options...
RescueDuck33 Posted September 19, 2015 Author Share Posted September 19, 2015 Update on XJ motor beeping running strong all great parts thanks for all the input made for a great ride! Link to comment Share on other sites More sharing options...
RescueDuck33 Posted September 20, 2015 Author Share Posted September 20, 2015 Link to comment Share on other sites More sharing options...
RescueDuck33 Posted September 20, 2015 Author Share Posted September 20, 2015 Link to comment Share on other sites More sharing options...
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