1960-62 235s do not have the front throttle pivot hole.
On the conversions I do, I drill the side of the block and install a pipe plug that I have drilled and taped to except the pivit post.
You can see the finished set-up here.
http://picasaweb.google.com/pre68bowtie/MechanicalPart/photo#5031057369668349522 The pivot is: 12 9/16” from rear of block.
4.850” from deck of block.