I guess I don't understand .I was under the impression that a stroker crank would require a spacer plate under the motor.Where would you put 1 on the Cannondale motor?
No plate required . There are several ways to compensate for the longer distance the piston travels. One is to make the rod shorter in which the piston should be checked to make sure the skirts dont make contact with the weights. Another is to make the piston itself shorter above the wrist pin by shaving material off the top so it doesnt smack the head.
Well shaving material off the top may weaken the piston and short rods definitly put more load on the skirts . I dont recall any one having problems yet with either setup.
When shaving the piston you also have to remove material for the valve clearance in the piston top. If not your gonna get valves contacting the piston which everyone knows leads to failure.