Hi there thanks for reaching out. I believe so but could be very wrong… I think 67 was when 383s started showing up and the suspension was beefed up to accommodate as such… having said I think the length is the same for early As and it’s the strength that was changed… so I am looking for a pair a little sturdier than my torsion bars that are setup for a 273/ 2 barrel… as I’m building it into a 4 barrel…