I wasn't sure if the more open heads and intake would need any different timing. Other than that I have gone back to 10BTDC.

I do want to verify TDC on my 1975 Bronco Harmonic Balancer. When I first got the timing light aimed at the truck the timing was 19 BTDC with no ping and 87 gas. Did a GT40 upgrade and using 19# injectors. Very low gas mileage, 8.11 with 10 BTDC timing, 4.56 gears with 37' tires. I am getting some idle search at startup and the engine is running a bit rich. I need someone familiar with moving pins and the importance of the various sensors within the EEC-IV computer with the A9L code. Most importantly I am trying to get rid of some codes or make the computer look past some missing elements that would normally be in the system. In fact, I used the 302 v-belts at the time and the harmonic balancer and yes the appropriate flywheel for balance. I do have BAP, TPS, Mass Air from 1993 Cobra, ECT, ACT.off the top of my head. No EGR, No Canister, No VSS, No air pump, No air conditioning. My questions evolve around putting a 1988-1993 5.0 into an older vehicle without all the stock sensors found on a Mustang.