90 HP Evinrude lower-end gear removal

[Andre]

I have a 1981 Evinrude 90hp that I destroyed the forward gear in last year. To remove the section of the lower-end that will allow access the gears I need to screw in two "very long" bolts and use a puller to extract a section of the lower-end secured by four bolts. As my puller didn't come with that size and type of bolt I need to pick some up from a special bolt distributer down the road from my work.

Can anyone tell me what the specifications are for the two bolts required to pull this section off my bottom-end?

Thanks
Andre