This fourstroke thing in 10cc pattern ships remends me of when Carrol Shelby went to Chrysler. We know of the stuff he did at Ford; Dodge had the four banger thing called the Omni and it was just that, a grocery getter. He did some suspension and turbocharging mods and did a comparison at I think Willow Springs with it versus the Mustang GT 350 which was one of his older creations. The little car that could did but for us hot rodders this was anethema because the Omni really did beat the much older '66 Mustang. It didn't look right, a real live muscle car being blown off by a smogged up four door granny car, but we got used to it. I would think an OS 91 pumped would just about drop in my Hanson Tipo but I will tell you the purist in me says go for the rear exhaust 60, it was made for it. Any gripes at my field and I will run an unmuffled pipe at that.