Where do I adapt an external oil cooler to the 4bd2 engine? The 3500hd Chevy truck that I'm using has a real nice cooler already installed. I see that the motor already has one on the block, is an external cooler necessary or beneficial ? I will be using the truck quite hard at times, and will use pto power for hours at a time without the truck moving. (hydraulic concrete wall saw 40hp)
