I have my 53 1/2 ton down to the frame. I'm finishing MII front suspension right now. The next step is to install the 350 V8 and tranny(?). Is there a best way? What should I use as reference? Can and should I use the original tranny crossmember? Can I safely position the engine in the frame with the cab off or am I taking a big chance on firewall interference etc? I would appreciate any advice. Thanks. Ron