Cooler question
As for me I always go overkill, therefore my set-up:
Derale Atomic Cool (P/N 13950) w/ auto 400 CFM fan (180' on, 170' off) running through -6AN steel braided lines and paired with a Derale deep steel cooling tube pan (P/N 14104).
-Stock cooler + cooler = Keeping the fluid from getting "too cold" by routing through the cooler first, then through the radiator to bring the temp back up.
-Cooler only = Easier to route, keeps the fluid from heating back up inside the radiator in high temp. areas like FL, TX, AZ..etc...
With a 4k stall and living in FL I doubt the fluid will ever get "too cold". I dont have a B&M but Im pretty sure it just comes with high pressure 3/8'' fuel line like all the others. As far as leaking it could be from the NPT fittings. My Derale cooler uses -6AN, and AN fittings are flared aluminum fittings the you can almost spin all the way tight by hand. Just a small touch with a wrench synches them up air tight. Unless your going to do braided line then dont worry about it because you'll just be hose clamping the fuel line on the end of the fitting anyway. This is probably where most leaks come from.
AN fittings + AN hose ends > Fuel line + hose clamps


