Well my free holes turned against me. Once I got the center and both outside latches bolted down it was clear that the old holes were of no use. Not only were they too high the 4th door side was really cockeyed. (Photos #1 & 2).
I took the two latches and screwed them to a straight board in the correct spacing. (Photo #3) Then I only had to get the board lined up on the center base and make sure each end was the same height to mark the holes. Photo four shows everything as it should be, all nice and lined up.
The worst part of the previous attempt to put the square body seats in is that some FO ( Future Owner) will look at all the holes (Photo #5) and wonder if the PO who installed the seats knew what a tape measure was?
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread
http://67-72chevytrucks.com/vboard/s...d.php?t=698377