Help needed for wiring harness on LS3 swap

[Vince@Meanstreets]

Originally Posted by Ron in SoCal

I have a brand new PSI LS3 / T56 magnum harness on the shelf if you need it.

I didn't see that on your web site Ron?

Whats my dealer price?

[Vega$69]

You don't need to shorten, cut or re pin to do the job.

This is my new build in progress. The fuse box is mounted behind the pass headlight and all wire bundles are securely tucked in the inner fender along with the AC and heater hoses.

The sensor wires will be folded into power braid to the proper length

[droptop 63]

Originally Posted by Vega$69

You don't need to shorten, cut or re pin to do the job.

This is my new build in progress. The fuse box is mounted behind the pass headlight and all wire bundles are securely tucked in the inner fender along with the AC and heater hoses.

The sensor wires will be folded into power braid to the proper length

Beautiful detail. My problem is space under the dash on a 63 nova once you try to make the Vintage Air box fit in the same space on the firewall. Any suggestions??

[ADiCarlo]

I vote for PSI I know and have seen a ton of people running their stuff.


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[alongfortheride]

I have not ran psi. I have now ran 2 Speartech units. 1 ls1 t56 and 1 lsa856. I must say the Speartech stuff is very nice. He will make it what ever length you would like. John is great.

[cpd004]

I've had both PSi and Speartech...the Speartech is the nicer looking of the 2 and seems to be better built. I could be wrong, though. It's cost is much higher. The braiding they use is the softer material making to easier to tuck in and around things compared to the corrugated stuff. There wires seem to be more pliable. Also, Speartech provides provisions for AC and cruise control. Their fuse panel is less bulky and no need to run wires down to the starter like with PSi.

Both companies are always quick to provide tech support.

I have no experience with a GM harness, but if I already had one....I'd definitely use it and spend money somewhere else. Something always comes up that you didn't expect.


BTW Vegas...that engine bay looks great!

[randy]

Originally Posted by Vega$69

You don't need to shorten, cut or re pin to do the job.

This is my new build in progress. The fuse box is mounted behind the pass headlight and all wire bundles are securely tucked in the inner fender along with the AC and heater hoses.

The sensor wires will be folded into power braid to the proper length

my harness is complete and i second this. Hardest part is finding room to mount the fuse box and ecm

[Revved]

Getting ready to start my first LS376/4L65E / Detroit Speed Swap into an 80 Trans am... I've got the whole GMPP Package and I'm looking at those miles of wires and getting my solder and shrink wrap ready!!

[Vega$69]

Originally Posted by Revved

Getting ready to start my first LS376/4L65E / Detroit Speed Swap into an 80 Trans am... I've got the whole GMPP Package and I'm looking at those miles of wires and getting my solder and shrink wrap ready!!

No reason to solder anything unless you are extending the wire lengths

[randy]

yes i didn't solder anything either. Everything on the gmpp unit is plug and play. i had to change the vss connector for the t56 magnum but that was it. Now the american autowire kit is a diff story. I didn't solder anything there either though

there will be a lot of wires that you will not use if you are using the gmpp kit. I made this and helped a lot