TH400 to 4L80e swap come in

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First post! Im tired of 3300 rpm at 70 on my crate th400 so im swapping in a 4l80e!

Our best local trans builder is building me an early 90's trans with a converter for $1500-1800 depending on what it needs. Should have it by wednesday. I will be using a stand alone controller for it. My truck is an 85 C20 camper special. Carburated and freshly rebuilt 350 built by me. 4.10 semi float 14 bolt rear and its current trans is a crate gm 400.

My questions are: does anyone have any feedback on this controller ill list below, its reasonably priced at like 600 for it and the harness.

http://www.usshift.com/index.shtml

Also is the 4l80e longer or shorter than the th400? I want to get a price quote on a modified driveshaft. Thanks!
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