Install LS1 into 72 Chevy Truck

[chevylover]

Where is the best place to buy a plug and play wire loom?
I have a 4L65E Trans, I need to find a speedometer cable that goes from electrical to mechanical.

[Firebirdjones]

Did an LT1 4L60E swap in my wifes jeep and currently doing an LQ4/4L80E in my 72 blazer.

I've found the best place and reasonably priced plug and play wire harness' from Howell Engine Developments.
They supply the custom tuned computer for your application as well as a custom made harness according to what you want to run, and it's usually in the $600 range for everything. Simple plug and play, everything was labeled and easy to install. Plus customer service was excellent and they have a great tech line if you have problems.

As for your speedo adapter (and any other adapter) you might need I use Advance Adapters. They have most everything including the VSS adapter you are looking for.

[bigrondownhiller]

Painless also makes a harness.