It just depends on what B&M says come with, Vague yea. Some kits come with all the accesories and some dont. The smaller one should work fine, Your not pulling a 28ft trailer with your fbody right?
The cooler can be mounted on the inside of the radiator "if you have standard belt driven fan" just find where you want to place it and cut a 1in x 3in slot to allow the cooler lines, I find a good place to cut is 1,1/2 inch down from where to top conects to the bottem of the shroud passenger side. You want to kinda keep the cooler to the side to allow the fan to do its job. there are 3 benifits to using an aftermarket cooler. 1. the transmition usualy runs cooler. 2. up to a quart more fluid can be used. 3. The water temp usualy drops 15/20degres.
SSC

aghh I hate editing.
[This message has been edited by SUPER-SPORT-CHEVY (edited June 25, 2001).]