That is just what came on the engine, and all reports I read on them says that they breathe pretty good. This is a street cruiser and not a full gonzo horsepower car, and I am trying to use as many original parts as possible. My current car, a 59 Vette, has all aftermarket parts like headers, S&P drive and accessories, ect. This one I want to look like it came from the factory that way, and am really making an effort to avoid all the glitz on this car. I don't know if I will be able to avercome the urge to fabricate and polish, but I am trying! I will glass bead the exhaust headers and will chrome ceramic coat them to make them look nice! This car is going to make way more horsepower than the tires will be able to handle, so pumping more horsepower into it is an effort in futility anyway! 245 tires are the largest that will fit in the wheelwells of a 65 Vette, and I can't move the wells in without encroaching on the top storage area.
I pulled the pan today, and the correct answer on the deflector is, the deflectors are different. The Front-sump LS2 deflector lacks the place to accept the mounting leg for the pick-up, but with a torch and a ball-pein hammer, I managed to dimple the deflector enough to mount the leg.
Regards, John McGraw