Thanks yall. So last year I joined the MidCarolina Jeepers and decided to turn the truck into the trail truck I was originally going to build.
The first major thing I did was to take off the carburetor and go to fuel injection. I'm in school now so everything was done on a budget. I had a wiring harness from an 88 Crown vic with a 5.0L, along with the TFI distributor and was originally planning to use the upper and lower intake from the car as well but found a '97 explorer intake at pull-a-part and decided to go that way. Apparently the explorer intakes are good for about a 15hp gain because they are the same internally as a cobra mustang. I also got the fuel rail, throttle body, injectors, and mass air flow sensor from the explorer. The crown vic harness however was a speed density based EFI strategy and I needed to convert that over to mass air flow. There are alot of articles about this on mustang forums, but basically you can switch around some wires at the computer connector, add the mass air flow harness and convert from speed density to mass air flow. So from here I bought a computer for the 89-93 fox body mustang from autozone which uses a MAF sensor. But I have a '65 289 block so there are no EGR passages, or any emissions on it, I also wanted to clean up the wiring harness so I removed all of the EGR, the air pump, the A/C circuit. But just removing all the emissions would throw codes in the computer, I also was planning on using the explorer mass airflow instead of the mustang one, which has a different transfer function so I had to buy a programmer for the computer. I ended up getting a quarterhorse programmer. This lets me connect to the ECM, turn off all the emissions, change the MAF transfer function, change the idle speed, change the O2 sensor delay for long tube headers, basically anything in the computer. So next I just had to add the high pressure fuel system, I kept the low pressure pump at the fuel cell, this pumps fuel up to the engine bay where I put a filter which also acts as an accumulator tank and from there I put the high pressure EFI pump, the fuel goes through the fuel rail then returns to the accumulator and the rest then returns from the accumulator back to the fuel cell. This way even with the low pressure pump off the truck will still run until the small accumulator is empty. I also had to add the O2 sensors in the collectors, they have to be on the top of the exhaust so they don't collect moisture which was a little difficult to weld the bungs in with the exhaust in the truck but just took a little time. All in all the EFI turned out great, the most expensive part was the braided stainless line and AN fittings.
The original harness and crown vic upper and low intake and distributor
The explorer lower intake I used
Putting the lower intake on
This is the hardware part of the quarterhorse programmer
It goes inside the ECM, before
After
This was the harness ready to go in
And this is ready to run
