I got my 4L80E from Hughes Performance via Sallee Chevrolet, who is a distributor for Hughes.

Hughes builds their strret/strip 80E to handle up to 1000hp. I am using the TCI T-Com controller. So far everything is running great, and being able to tune the tranny allowed me to put in a dual personality - around town it shifts like your Dad's Buick, but as soon as the TPS gets to 47% (right where my EFI secondary blades start to open), I jack up the line pressures in each gear, and raise the shift points. Best of both worlds!

Jim