I have a 1992 chevy G20 sportsvan (regency conversion) 5.7 v8. The service manual that I bought says that it has a GM Hydra-Matic 4L80-E RWD auto transmission (4 forward ranges including overdrive). I need a new one (before you ask me why I think I do? I've been over that with other mechanics, but i can repeat it again later if you want). Parkway Automotive, Arkansas mechanic is trying to push me to go with Jasper. When I do the "vehicle owner price search" on Jasper's website, however, they are trying to push me to select a 700-R4/4L60? What's that about? I asked Parkway for a quote; they will do everything for $3,377.78 (which includes a $2,125 Jasper package [$240 core included, and seemingly the cooler kit, cooler flush, and core charge included as well], and a $290 charge for what they are calling the "Premium Package from Jasper Engines [which the jasper website says is only $40 (tow/rental car]. After all of my research, I want a 4L80E. I need Advice on model & price? thx!