If the CJ still has the C8OE-6090-N heads use em. Same with the C8OE-9425-C intake. It's iron and heavy and all but a great stock piece. Edelbrock heads are pretty much the aftermarket standard of choice. Buy the 428 heads with the 72 cc chambers. These have the 16 bolt exhaust holes if your running the stock CJ ex mani's. The Edel 427 heads are 76cc's and only have the 8 bolt exhaust. You can do a quick port match and have a nice set of heads. Also buy them bare and get your own valves, springs etc.....to match your cam. I suggest the ARP rocker studs vs the stock bolts. Blue Thunder makes a nice copy of the 4V PI intake and the 2x4 MR. Which Tremec is in there? If it's a 500-600 those are rated at 500 ft lbs and 600 ft lbs torque. What rear is in the car now? 8" or 9"? Open or locker?