I have a '86 K5 with a 350 and the SM465 4 sp tranny. I want to convert it over to a auto with overdrive. How much is involved and what do you guys recommend for a tranny (TH700-R4)? What parts are needed for the covertion? I use the vehicle for pulling a boat and highway use mainly as it is my vacation vehicle. 1986 K5 All stock except a fully built crate 350!