Engine Oil Cooler Install

Going to the MFR's website, and looking at the dimensions of that part versus their standard (wider tube) oil cooler, there is about 1.5 to 3 times the pressure drop for this slimmer cooler compared to their standard width oil cooler (with the same core size). It is listed at 3.3-4.1 psi drop at 5 gpm flow and 20W50 oil.

And the Pegasus application notes indicate it is for smaller flow uses than engines. So my personal opinion is to not use that part for your size of engine and pump flow. (5 gpm is a 'middle-of-the-range' oil flow rate, so you could get higher pressure drop at really high revs IMO.) It might be just fine for a smaller 4-banger engine, with a smaller pump and overall lower oil flows.