What tranny cooler for an AODE?

[Boss 351]

Currently it's all stock but I want this tranny to last long (I'm not lucky with automatics lol). I'm thinking about bypassing the stock radiator coolant method and using it's own cooler. But what size should I get? One for a 25,000GVW or what? Bigger the better, right? Anyway what would you guys recommend?

 

[Rick 91GT]

bigger is better, I use the large B&M unit a lot. It take 1/2" NPT fittings, and you want to use -6an line (3/8"), you need to use fittings and hose that are made for tranny fluid.

If you need PT#'s or help let me know!

 

[Boss 351]

Just installed the cooler, it's a big one that measures 11"x8" or something like that. It works because I couldn't even touch the tranny lines from the radiator (stock) before and now I can put my hand on the tranny cooler and the lines that lead up to it.