Ok here is what I got. I have a 90-92 MAP tpi ecm and harness that I plan on retrofitting into a 1988 305 TPI formula that I have acquired. Here is my setup and questions.

My ecm and harness is custom built to eliminate all emissions equipment and run a big cap 4 pin HEI distributor and have stand alone cooling fan control, fuel pump control, and overdrive with no ecm involvement.

My questions are.. Do they make a stand alone fuel pump relay control for the stock fuel pump connections to where it will be plug and play and all wiring consists of an ignition on source?

And also do they make a stand alone dual fan relay control that works with the thermostatic switch rather than the ecm turning the primary fan on?

Also on these cars what is the most common way to wire in a device that needs ignition on power at the turn of the key. Ive seen it done a long time ago in the fuse panel but someone needs to refresh my memory on it.

Any help would be greatly appreciated.

 

https://www.thirdgen.org/forums/cool...t-cooling.html
https://www.thirdgen.org/forums/tpi/...ssy-160-a.html
https://www.thirdgen.org/forums/tpi/...p-problem.html
To help with getting the fuel pressure before starting it would be advisable to have the ecm control the fuel pump relay. Here are all the schematic you need to decide how you want to wire the fans and fuel pump.
ACC sources can be found at fuse box and or secondary tap next to the door chime module, d not use the ign wire for additional accessories.

 

I can vouch for the Dual Fan relay set up from Formual1LE, a member here on the boards. I have one of his systems installed, upgraded my single electric to dual TPI electric fans. Build quality is top-notch and the install is strait forward. Also, both of my fans are turned on by fan switches, not run by the ECM. I'm very happy with it.