What shop did you ended up going with?
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"The Engine Shop" in , Collingdale PA. The owner Carl is familiar with the 4.0, he asked a lot of questions on how I use the jeep. We decided to go with a performance cam, slightly upgraded pistons and he is going to do some upgrades on the head (valves springs etc) he says I should pick up close to 20 hp over stock as long as I run a 62MM throttle body with a C/A intake.( he did try to talk me into building a stroker) The price was more than fair as compared to all of the crappy reman companies that are out there and he backs his work with a 3 year unlimited mileage