[MARKDTN]

If you are going to build the 200R4 first then fine, just don't yank a used one out and expect it to last in a truck. You have to ask yourself why GM never used a 200R4 behind anything bigger than a 307 Olds. No Corvettes, no big blocks, not even a 305 IROC. 200R4 was used in the Turbo Regals and GNs, but they don't last long there after engine mods.

I would do a 700R4. They got a bad reputation from early on, but if you get an '88 up core with the improved guts they last a long time. They also get a bad rap for swaps for people that didn't adjust the TV cable and burn them up fast. You should not start the engine until the TV cable is properly adjusted!! It is that important. The 4L60E that is still used today is a derivative of the 700R4 and they last a long time. I have one in my '01 Tahoe with 264K miles that has never been out.