I need some wiring help.

I bought a full pull out from fparts.

This is a LS1 T56

I'm putting this in a 66 nova.

I'm using the the GTO stock gauges stock fuel pump and sender the pcm and ecu.

Should I go with painless wiring?

Or just order the stock wiring harness it's hundred buck less?

The 1 inch by 2 inch plug that I think plugs into the fuse box
I need some kind of wiring diagram that lets me know what each of them does.

 

Nice swap package and target!!

Don't go w/ Painless unless you want to dump the '04 PCM and maybe deal with sensor incompatibilities...the Painless setup is pinned for a '98 F-Body PCM.

There's not been much, if any, GTO action here so you may be blazing a new trail.

Check alldatadiy.com or wherever Alldata is hosted and spend a few dollars on schematic printouts and connector pinout diagrams.

 

I PUT A 99 LS1 IN 66NOVA AND USED THE GM WIRING IT,S EZ IF YOU STILL NEED HELP E-MAIL AT STAN_THE_MAN70@YAHOO.COM COOL RIDE FOR A LS1
STANLEY

 

There are a few companies out there that may be able to help you. Speartech has always been great on here. Now I see Speed Scene is aboard, which I have never really heard good things about, but we'll see. Also, Current Performance Wiring is who I have used in the past and they are very reasonable and good to deal with.