for future reference, if you have a V6 79 el camino and you install a small block chevy , a th350 and a ford 9" , you WILL have to modify the transmission crossmember or buy a new one and use a long wide pinion yoke to be able to use your original drive shaft and joints. You dont have to change the crossmember but the original one is offset and i didnt want to use that in a car I am going to drag race, I also got rid of the outter transmission crossmember bushings and used a polyurathane transmission mount.