I think the descriptions is a little misleading as I have previously spoke with Don about. Although the tower itself would be a direct swap for a 67-68, the top flange which the fender aprons weld to will also need to be swapped out with your original 67-68 pieces. The 69-70 flanges are taller than the 67-68. What this means is that you will also have to drill out additional spot welds inside the top of the tower to separate the flanges which is also part of the top spring perch. Otherwise, I have no doubt this would make an excellent upgrade for the additional effort. Don was nice and allowed me to return and refund the difference for used 67 towers so I have zero complaints. Thanks WCCC!