How to Install a 4L80E into 1967 - 72 C10 / C20

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Originally Posted by 72c20customcamper

I was looking into getting a 4l80 or 6l80 for my 72 . Problem is they want big money for them around here . Same with LS motors making it cost prohibitive for me . I am leaning towards the GV unit for it $3400 for a new unit then I just need to get the driveshaft done . Been looking for a used unit but no luck .

I looked at them too.
Watched Stacey on Gearz with Copperhead which had one.
I just don’t want to have to pick lockup or no lockup, this or that...
I just want to set it and forget it...just work! Lol

All the places I looked at that wanted to build a 4L80 for me were $10,000 just for the transmission. I don’t like being taken advantage of, so I just kept my eyes open on FB marketplace.
Found this one, along with the new controller and a bunch of other very useful information.
Ordered the mechanical speedometer housing with the correct ratio installed this morning. Dan at Alloy Specialties was awesome to deal with. Shipped it out same day with a tracking number.

I want to find a new internal wiring harness for it now to repair the bent pins on the connector.