Thinking about checking out this 65 Barracuda

65 4 speed car would have the 7 1/4 depending on when it was born. A lot of 4 speed cars had the rear changed if it went in for a broken rear. Ma Mopar did do a recall in that they only warrantied the 4 speed cars. NHRA made the call in early to change the rules in Stoc/Super Stock to allow the 8.75.