The mc is for a 1/2 ton, I assume. It is pretty small. The 5 speed out of the '88 half ton utilizes the hydraulic clutch, so I will try it. I respect your opinion about them, but I have had pretty reliable service out of them on several trucks. I think it is worth the risk on this truck, no more miles than I plan to put on it. I am interested in resurecting the hydrovac. It takes one brake line from the original mc and sends it out through front and rear lines. Maybe this will make up for the shortcomings of the small mc / clutch unit. Thank you for your response to my first post!