I bought the setup at the end of last year while Holley had a sale going.
Bought it from JPC racing and they provided me with a startup tune with my injector info loaded.
The harnesses are all plug n play with labels.
Holley sells a main engine harness for the modular engines. It just plugs into all the stock locations. You have to use new 100psi sensors for oil and fuel pressure harness.
The harness doesnt have provision for the stock fan or the alternator. The alternator wiring harness separates from the main engine harness. I then plugged it into the stock locations. Holley has input/output harnesses that you can connect to many different things so that you can program holley to control. I used one of the output wires to power a relay which turns the fan on/off. My fuel pumps still worked when I turned my key on so didnt have to change anything there. Now to the stock starter switch.
Under the dash you remove the panels to get to the ignition switch harness. I cut the white/pink strip wire. Coming from the switch side of the cut wire I connected in a new wire and ran it out to the driver side. I connected to the ignition wire that run to the starter. That allowed the stock switch to start it.
I cut up the stock harness. The section that goes to the transmission separates from the main harness. I plugged it back in and got my stock speedometer to work. I left the crank sensor wire attached to the main plug. I spliced it into the holley crank sensor wire. Bolted it back to the main plug and now my stock tach also works. I turned off all the switches in the tune but the check engine still comes on. I will likely just remove the check engine bulb.
Yes. I used the stock alternator and transmission harness. They separate from the main harness. I cut every wire from the main harness except the crank sensor wire. It's on the right side in the pic above.
Installed a set of Holley 120lb injectors.
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