Most of the miscellaneous cab hardware is the same from Coe to pickup - all the glass, window and door levers, gauges etc. Also most all the patch panels for the cab would work, with the notable exceptions being the toe/floor boards and door bottoms. As stated the front end sheet metal and grill are Coe specific.
The coe engines all use an updraft intake to clear the floorboard. You have to keep an updraft intake to maintain any floor space in the cab. All the v8 swaps I've seen usually result in something that looks like a wheel barrow turned upside down in the floor.
The rear frame, on AD COE's at least, is the standard 34" so swapping the rear is relatively simple. This would allow for some faster gears, but then you've got to have enough motor to push it and enough brakes to stop it.
Scott
