When I bought my '66 it came with an extra engine and transmission, now I am told it may be quite valuable. It is a 289 with a top-loader 4 spd transmission. I was told it may be out of a GT. Does anyone know what this is worth? I have someone who wants to buy just the transmission but someone told me it may not be wise to split them up. Can anyone offer insight on values of the transmission and engine opposed to the combo?