the Z bar and mounting brackets are differnt 1964 -66 and then 67 and up
the 64/66 z bar and mounting brackets are hard to find,, if it is a v8 z bar dont toss it,, some one will need it,, also the ball stud on the frame in the 64 65 66 no one is repopping,,, if its the orignal trans the drive shaft is bolted to the back of the tranns,,it probably has a 3.09 first gear,,all other 4 speed have either a have a different ratio firstr gear,, the ratio escapes my mind at the moment,, the 3.09 works great with a small engine, gets you off the line with quicker rpm,s i use one in my car with a late model tail shaft,,,the cross member wil probably bolt to the newer A body,, but the rubber mount in the cross member is a 2 bolt 66 and newer are single mounting bolt,,
the pedals will work i used late mofel pedals in my 66 for a long time till i found the earlier pedals,, some one will probably be willing to trade you the corect pedals,,and yes the bell housing and clutch is smaller if orignal,,
any one looking for a bell housing /scatter shield that will fit any " A " body,,quick time is now making them very small is size where it counts,will fit a 10 1/2 inch clutch,,