Hello everyone,, this is my very first post here... my question is, someone else put a different shifter in my 1968 firebird coupe before I bought it.. they cut the tunnel to make a fit for this shifter.. the motor is a 1974 455cu. I'm not for sure if it's a GM Muncie Tranny, I think it is.. the housing is aluminum.. What I am wondering is I've seen Classic Industries sells a complete 4 speed shifter assy. for the 68 Camaro,, is that the same for a firebird, were they the same back in 1968,???.. Will it fit okay??.. TIA