ORIGINAL: Tor
Those ignitions that horison had in stock was with the old plug (looking from the pics they had on the site at the time, I even considered purchasing one). Maybe they never had the new plug ignition in stock. Too many maybes to make assuptions in my humble oppinion.
As to crankshaft differences, that only applies to the 58 as far as I know.
Also not true. I ordered an ignition for another Evolution engine and it was the new style. I have the 58 so I can say with confidence that it is true about the crank on the 58. I dont know about the others. I do know that a friend had a front bearing go out on his old style 58 and Horizon is going to replace the engine. What does that tell you about parts on the old style engine and their availability?