On the 1960-62 engine conversions I drill the side of the block and install a pipe plug that I drill and thread for the pivot stud. (see pic.)
http://picasaweb.google.com/pre68bowtie/MechanicalPart#5031057369668349522


Throttle Pivot Positions
(216-235)

216 12 9/16” from rear of block
4 .850” from deck of block

53-59 9 1/8” & 12 9/16” from rear of block

1960-62 9 1/8” only from rear of block




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