as stated, only differences are the counterweights system, what is adjustable to teh desired curve. Rest is a bone stock piece. Same bushings, same pick up trigger, same vacuum, same cap and rotor, and even same housing.

Oh and also the shaft flat end is APROXIMATELLY 90 degrees off with the rotor than the stock dist making the rotor off the original #1 on cap. Some to consider when setting spark plug wires. You can reset the spark plug wires dist at cap, or relocate the interm,ediate oil shaft to keep the number one on original point ( what is what I made )