[marxjunk]

you dont have to modify anything the 64-67 bolts right in, you need a ball stud for the block..theres several ball studs avail to dial it in a little better, but the stock 64-7 works fine..the top slid a little, but in hand they mirror each other


heres one of each a 68up and a 67...they are clocked the same, length and height is the same etc...

the 68 ups where junk from day one, they did well, but they are prone to wear, on the early you drill the holes out put bronze bushings in and they are done for life..and i have never seen an early one wear so bad it stops working..