head stud spacing?

[BFB]

I have two fly cutter / boring jigs that are real similar to the standard GB unit for the later 1600's but they are quit a bit smaller. I think one might be for a 36 horse?
I was wondering if ya'll could tell me the head stud spacing for any of the older engines? or if you could identify the tools?

I measured both but only remember what the one was and only because I wrote it down.. on the tool, in the picture. the other tool was bit larger, I think maybe 112mm across? id have to measure again to be sure though.

thanks

_________________
"how am i supposed to torque the rear wheel nut to 250 ft lbs??? " - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
Most experts aren't.

[BFB]

Almost a month, 154 views , and not a single person has or is willing to take measurements?
_________________
"how am i supposed to torque the rear wheel nut to 250 ft lbs??? " - clonebug
An interesting thing happens in forums where everyone starts parroting the same thing and "common knowledge" takes over.
Most experts aren't.