Why not pull the transmission out and replace it with a 4L80E? I believe they are the same size and interchangeable and the 80E is much stronger. Would save you the cost of a rebuild.
Sent from an unidentified bayou mobile device
Would require a modified harness, new slip yoke, trans mount, driveshaft, tune, converter, etc... It's not a difficult swap, but certainly not bolt on and go.
Thanks for the info on the Westbank transmission guy. Every place I call wants $1200 to rebuild my transmission. I will try custom built transmissions.