Hi Sid318, you can run any combo you like under those big fat fenders. Though the 20" you'll need to run a smaller profile like a 45. 255's would be the widest to go on the rear with a stock diff. Most of us who own 50's F-trucks run 15X8 all round. look in my gallery and you can see my whell combo set up.
Life was never meant to be easy.......
1953 Ford F100, 351c, C4, 9" rear, jag series 111 front end, gas light blue......
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