Did your engine poop out? Or are you just looking for more power?
Just curious, my engine runs great.. just your standard 9115 that came new with my VS 4 yrs ago ...but I have always wanted to have Pat D . Build me a bestspoke engine, And while at It change the gearing on my transmission to better match the new engine..., but I have been holding out till it craps out..,.. but it just doesn't. It keeps running strong. Knock on wood.
this is my way of living vicariously through others.
cheers