I am selling my 87 Iroc on the site, If it does not sell I am looking for an alredy done engine harness and ECM for LT1 w/lt4 hot cam kit, ported heads full 3in exhaust, manual trans, I already have a 4pulse speedo output for the ECM speed input, and the LT4 knock sensor. I have a 95 LT1 buick harness and ECM already, I am going today to obtain both 87 and 95 wiring diagrams for comparison and may try to use the 95 LT1 harness, anything out there already done let me know, Thanks Jeff