The Wedge motor can be a bit better balanced at its 56.25 degree V versus all of the Harley motors, non counterbalanced, touring V's at 45 degrees. In the old days before rubber mounting of the FL series Harleys, motors were balanced to perform best at a "range" of rpms, usually in the 3,000 to 3,500 rpm range. Outside of that range, the balance is off and gets worse in both directions. 90 degree V motors can be perfectly balanced and are tons smoother. The Dyna motors are still rubber mounted in the 2000's and again, after 2006, they have the newer 5-bolt primary pattern versus the Wedge and older pre-2007 Harley motors.
I have to fall back to what I've been saying, the "B" counterbalanced Softail motors would make the best alternative to the Wedge S&S motor. Exhaust, motor mounts, fuel and a few misc items would need to be sorted out, but that base motor would make the most since. I've been checking this afternoon for the Harley SE-120ST crate motor that Harley produced and the one that's in ACE #10, seems to be non-existent at this point. S&S makes older style Twin Cam Harley clones, but again, they're the "A" version only, not counterbalanced. So, at this point it seems that building a Harley "B" motor to utilize the majority of the M3W parts is #1, but using a later, possibly even a M-8 Harley counterbalanced motor, would be a new motor application. Only that would require a complete new drive coupling system to what the M3W vehicles now use.
Nothing is going to be a bolt in at this point. Maybe not the most likely scenario would be a continuation of the Wedge motor in parts for maintenance or possibly someone else picking up the production of the motor.
