tranny id ???

hi folks;

i'm new to the board and hoping for some help.

i don't have a Z-car; but i do have a rebuilt 4 speed transmission. it appears to be an earlier 240/260/280Z or possibly a 1600/2000 roadster unit. there are no tags or identifying stamps on it. it has several casting marks on the tailshaft housing and gearbox case. i'm not sure if it's referred to as a 3 or 4 piece case; but there are 4 distinct parts - bellhousing, gearbox case, intermediate plate and tailshaft housing. it has a 3.5XX 1st gear and 1:1 4th

i'm trying to identify it for sale and any/all help is appreciated. best to reach me by email . thanks,

mike