Ford f1 rim backspacing?? Help!

Ok there is a guy on craigslist selling a set of smoothie chrome rims. They are 15"x6" bolt pattern is the large ford 5.5 and the backspacing is 3". Now will these work on a 50 Ford f1? I measured the rims i have now are 3.75" backspace. I plan on running 205/75 front and 235/75 rear. They are listed for $150.

 

They should fit fine. I'd buy em anyway, they look pretty nice.

 

If for some reason they don't fit throw them back up for $175. Lol.

 

Should fit, just make sure you have 3/4 inch space between outside of wheel and fender....