I've got an Indy IM right now, but I've always wanted the 2 stage that the R/T's and ACR's have... But I know the 2nd stage butterflies are electronic and I'm not sure how or if there is a way to use them on a non-magnum. I've already done Mag head, header, cams, pully, valves, springs ect. pretty much rebuilt the whole top end from an old scrath crap engine. But I would like the R/T IM if anyone knows how to do this swap that would help alot! Thanks