1968 baracuda

68 Barracudas have the Small Bolt Pattern. (SBP) That's 5 on a 4" bolt circle. That severely limits wheel selection unless you convert to the more common Large Bolt Pattern. (LBP)

Looks like you are a newby, asking the typical newly question.
I thought the same thing when I bought my first Barracuda in 1969. Went to the tire shop money in hand to buy fancy wheels and got schooled on the BVD Bolt Pattern pretty quickly. That's Barracuda-Valiant-Dart.