Quote Originally Posted by efwd View Post
Since you have decided these are probably not needed but here is the pic I promised. Looks to me that you would be fine without.

Eddie thanks! Your spacing (without bumps) looks similar to mine. I do wonder, while the bumps add head room for the rail at its center, the side edge of the bump is still just as close, it would seem that a big wider bump would have made more sense if adding spacing was their purpose. Im still contemplating if they are needed...

Does anyone know what a good/recommended min gap from cowl to any part of the engine is?

As I have just installed my radiator/oil cooler today it would seem 3/16" is gap enough. This is what the manual calls out for the gap below the radiator... I will say mine ended up much higher, about 3/8 in... still falls within the duct and I may add baffles to cover the lower gap completely if cooling is ever an issue.