Just finished the swap out and I couldn't be happier. Fixed all the wiring problems I was having and between this and doing the Nutter I have eliminated ICM and ECM for any part of engine control. Runs great and smooth. Words of advice, take your time in doing this and make SURE your motor is set to TDC when putting in your new HEI. I highly recommend CRT performance for the set up. $150 for new HEI with proper cam gear already on it, the 2 connector plugs and brand new custom 8mm plug wires. Your old wires cannot handle the voltage of the HEI. You will see the difference in the thickness.
1988 Wrangler YJ, 4"lift on 33" BFG Mud Terrians