Spare tire wheel well on 1964 Plymouth Barracuda...what size 14 inch tire fits?

Thank you for your information....the 175/65/14 is 23 inches in diameter and 6.9 inches tall/wide...the 185/75/14 is 24.9 inches in diameter and 7.3 inches wide/tall.....looks like if there is an extra inch room diameter wise around the whole tire it should fit......does your tire sit well below the cardboard cover so the carpet is flat? With thanks.