transmission cooler and rear transmission seal

Hello, I am putting a PTC 9.5 inch converter, 3500 stall behind my 416 stroker. My question is in regard to keeping the transmission cool and happy on the street. This is only a street car. I am getting the summit brand deep aluminum pan already, but can any of you recommend a GOOD transmission cooler for me. I've got a trans temperature gauge installed also, so I can keep an eye on it. There are so many to choose from I don't even know where to start. Have any of you had any good experiences with a certain one? Or is a certain one junk? let me know, thanks.

Also, on a small side note, How do you get the rear seal and bushing out of the tailshaft? Do you have to have a special tool? Mine is leaking and while I have the tranny out I wanna replace it. Thanks

Will