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From what I understand, this is what I need: L31: 1. +12V from battery 2. +12V during Start & Run a. +12V to fuel pump during Start & Run b. 3. Signals for Tach, water temp, oil pressure, & VSS from trans to come from their respective sensors > through the L31's underhood fuse block > then...

Is keeping the underhood fuse & relay box stock possible??? I don't think so. There has to be some modifications. For instance, the L31 underhood fuse box has fuses for heated seats. I don't have heated seats in my Nova and I doubt you have heated seats in your Regal so you would have to...

I think your best and cheapest option is to get an aftermarket harness. I believe the cheapest is from Howell: http://howellefi.com/gm-vortec-products ... 3-4-5.html

I have almost finished the fuse box. The fuse box was completely separated from the harness to make the modifications simpler. The fuse box now has six relays: the original starter and fuel pump relays, two relays that will energized the HOT/RUN loads of the original Vortec engine (the relay...

Here is the plug for the EGR tube for the intake: http://www.summitracing.com/search?keyw ... 6596&dds=1

The 1996 C100 connector is on this page (after the 98 diagram). It is likely the same as the 1997. http://www.gmt400.com/forum/showthread. ... ec-5-7L-V8 Mike

Here is a pic of my 63 Nova SS Convertible: Here is a pic of my wiring harness now. You can tell the engine is a Vortec 350 (L31): Here is a pic of the EGR valve and the EGR valve delete plate. Note, this is not the plug for the EGR tube it is for the valve itself: Here is a pic of the...

I will be running headers (I thought you were too) so I am going to delete the EGR . This is the intake delete plate that I referenced in an earlier post: http://www.ebay.com/itm/CHEVY-S-10-S10- ... 3a7c82735a I have reduced my harness and have everything labeled-- the C100 connector and fuse...

It is a wire harness in the passenger compartment, probably stands for Instrument Panel. Mike

ATL Regal, You stated: "What is this "unnecessary stuff" you're referring to? I mocked the harness on the engine before I put it in the car and every connector/plug had a corresponding place for it to go, except the O2 sensors. I want it to run closed loop." This is the stuff I deleted in...

ATL Regal, As far as power goes, you only need pwr from the battery and an ignition/run source. To get power from an ignition/run source, the easiest thing to do is to find one wire in your Regal harness that is hot in start and run. This will likely be the wire to the original coil. You just...

Fundamentally, what you are asking can be done but would be very tedious and time consuming. It would be much simpler to keep your existing Regal harness intact as much as possible and just try to control the engine and transmission with the Vortec harness. If you get rid of the unnecessary...

ATL Regal, The numbers on the PCM posted tell you what year (configuration) you are dealing with. From a google search this appears to be a 1997 PCM. My PCM is a 1998 version and the wiring is slightly different, so keep in mind when I say a connector location or wire color you need to check...

ATL Regal, The connector which feeds the interior from the engine harness is C200 on this page: http://lt1swap.com/1999_vortec_5.7/inli ... d_view.htm Mike

I was looking at the info on lt1swap.com last night and he has it laid out pretty well what is required: http://lt1swap.com/1999_vortec_5.7/index.htm For the external connection, he tells you where it is on the existing connector, the color wire, and the electrical protection requirements. I...

I am using the L31 as a supplement to my existing harness, so I will try to answer the way I am doing it and maybe give you an option. Keyed ignition- yes, hot in start and run position; I will use this signal to pick up a relay for the ECM and to pick up the fuel pump relay. The keyed ignition...

ATL Regal, I may have been wrong about the VATS. I did read somewhere that the computer VATS started in 1998. As for the 02 sensors, I think you want Bank 1, Sensor 1 (drivers side) and Bank 2, Sensor 1 (pass side). Bank 1 Sensor 2 and Bank 2 Sensor 2 will be deleted (these are the rear 02...

ATL Regal, You stated, "I basically need to know which pins to take out of the PCM connectors in order to remove the rear O2 sensors, and whatever else I need to make it run properly." I see the aftermarket harness as the minimum set of connections "to make it run properly". I did not...

Here is a pinout diagram for a 1997 I found on line: http://www.justanswer.com/uploads/carfi ... 6_sub5.pdf This is the stuff that is necessary based on some aftermarket harnesses: http://www.hotrodlane.cc/harnessinstruc ... 252011.pdf http://www.jegs.com/InstallationInstruc ... -60212.pdf...

You can buy a block to reroute the hoses from the top of the compressor to the rear of the compressor. This will ive you more hood clearance. I'll look through my paperwork to see where I bought the block. Mike