[QUOTE=53 Chevy5;563403]I know this is getting the cart in front of the horse but I need some help with know what rim back spacing and offset to look at for the rims on this thing. It has the mustang II ifs and the track width is the standard 56 1/2. I am looking at 16 in with 4.00 backspace and 12 mm offset or 17 with 4.07 backspace and 11 mm offset wheels but I am not confident on the back spacing and offset thing. The more measure and check, the more I am unsure. I will license this photo of me to use for a pinup in your garage if what you suggest works.[/QUOTE

Haha! Great pic!!
I don't really have a sense of your final ride height but I usually go on record for "bigger is better" to a point...LOL! Here's a link to a '53 with 18's & 20's that I think looks pretty cool. It doesn't list the offset but it doesn't list wheel width & tire size.
1953 Chevy Truck-The Third Act