@VANDAN , what size are those tires, and what are you trying to put them on?
Khryslerkid's 62 dodge and my 62 plymouth are two different animals. If I remember right, John still has the 62 housing in his, and he has a much more "open" wheelwell than my plymouth . Mine has (I think) a 65 housing, so it's a little wider, and has been moved back an inch for tire clearance at the front of the opening.
I'm currently using 10.5x28 slicks on 8.5"rims with 4 7/8 bs, but I have to use .300 spacer to make them work. (So, essentially 4.5 bs. I also have a 10x28x16 on a 4.5 b's that fits perfect. The 8" steelies with 4"b's I had to use 255/70x15, the 275 I wanted to use (smaller than either slick) wouldn't fit, too close to the fender. I'm sure that size would fit on John's 62 dodge.
Edit: as wp29 says, billet only! I made my .300 and .500 spacers myself out of billet, but the 1.5 are purchased billet.