I purchased a partially completed kit which came with an O360 A4J (from stamp on casing and looking up on lycoming website - L-19752-36A) and came with a C/S Hartzell prop.

according to the guy i bought it from, the engine has 160 hp cylinders on it.

i'm assuming the crankshaft has been replaced with a hollow one to allow for a C/S prop - how do i tell?

also, trying to figure out shat cylinders would work to take it back to a 180HP.

any guidance is appreciated.

Chris