I plan on doing this swap with my 77' F-350. the IDI will fit, if you plan on doing a turbo on it though, u either need a body lift or some work on the firewall to clear the downpipe. Custom motor mounts need to be made. The stock radiator from the 73'-79' can be used, as long as its the super cooling, max cooling or the extra cooling radiator. Itd be best to have both complete vehicles to do this swap.