Goodrich tells me to call Coker

My apologies for missing your reply and thanks by the way. That is important information and definitely changes the direction I may go. I'm thinking 15x6 wheels on the front. I wanted chrome rallyes but they come 15x7 and larger. So, I checked on Keystone Klassics. They do have a 15x6. Will that look too skinny on a 68 Barracuda? My concern comes from the fact that I have 15X7s for my Charger (no tires on them) and they look really wide. Also, the Keystone has a backspace of 3.375. I know what backspacing means, I'm not sure I understand how it is applied to what wheel works. Again, thanks for your help.

for Mopardrt: I'm about 90% certain to go with the Coopers. I like the way they look and I can't beat that price. I owe you one.