I decided to replace my Ford top loader with a Tremec TKO 600. The car is a 1970 Mach 1 with a 351C stroked to a 408. I have been pricing installation kits and transmissions from several Tremec dealers. Most of these dealer's kits include a spacer plate that fits between the bell housing and the transmission. Others sell the TKO 600 with a short input shaft and the spacer plate is not required. The dealers that sell the transmission with the short input shaft tell me I can use my stock drive shaft without shortening it, because there is no spacer being used. The dealers that include the spacer plate in their kit tell me if I don't use a spacer, the transmission will be to far forward and I will have to cut the floor opening for the shifter. I don't want to cut the floor opening because I'm using my stock console. I don't want to shorten my drive shaft either, if I don't need to. Has anyone done this conversion with a TKO 600? AMP Performance uses a short input shaft transmission and an off set shifter that they say prevents from cutting the floor opening. Please give me some thoughts and ideas before I buy the wrong kit.