If anyone is interested, here is the size for the 3 bolts holding the gear box to the frame:

 

Metric:

 

M14 x 2 x 110

 

10.9 Class

 

Roughly 4-3/8" from inside of head to tip

 

 

I decided it was a good time to replace them because I cross threaded one of the bolts last time I replaced the gear box. I got 4 bolts and 2 washers for each bolt at Fastenal for under $20. 

 

 

 

Thanks for this timely post! I'm pulling my gearbox out next weekend for a rebuild (the output shaft seal is FUBAR and it leaks like an SOB) so when I inevitably drop one and it rolls off into the abyss, this will save me a few minutes. :D