To properly position the engine and transmission in the frame you want to have the cab on the frame, column bolted to the dash, rack and pinion bolted to the cross member, all the accessories "a/c, alternator, power steering", HEI Distributor, headers on the engine and the front sheet metal with the raditor you plan on running installed. It's best not to take any chances on clearances. The reason I say to have the column and rack installed is that way you can move the engine around slightly so the steering shaft from the column to the rack will clear the headers or exhaust manifolds with the least amount of u-joints. I usually have to install 3 borgeson u-joints with a Heim joint. When you think you just about have it where you want, don't forget to break out the fender well to firewall support rods to make sure they'll fit. You shouldn't require any cutting to install the V-8 in an AD.
