The trucks use a different bell housing than the cars. The car bell housing has to have the center hole enlarged to Cheverolet size then ears most be provided top and bottom to bolt the transmission to. The truck bell housing has a center hole that is to big in diameter so a spacer ring must be used to make the pilotshaft housing fit tight into the bell housing. The truck bell housing has a large flat surface on the transmissiom mounting surface and can be drilled and tapped for the T-5 transmission. With the truck all that you need to adapt a T-5 transmission is a spacer ring to locate the pilot shaft in the center of the hole then you can drill and tap the four holes to secure the transmission to the bell housing. I do not know if a pilot shaft bearing extension must be used, it does on the car bell housing as the T-5 pilot shaft is shorter than the standard car three speed pilot shaft.
