Hi and thank you for your responses they were helpful and I was able to locate the panel and the fuses. The fuse panel on the 4200 international chassis it's situated on the passenger side, just give a tug on the dash panel and voila all the fusses. Changing the original radio to a new one was easy once I got the proper pig tail that allows you to plug into other models. Radio is working great.
Also thank you for the welcome