Nope. There are two sets of outer holes. The buckets use one set the bench uses the other. There are usually 1/2" plugs that fill the holes. I attached a pic of my 69 GTS, the bucket holes are on the inside and the bench holes are on the raised portion.

7087240-101_1414.JPG (53 downloads)
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!