Hi Norm,
I think the original 4hp Briggs on this base was crossways. Its been that long ago I can not really remember. Anyway it was easy to do. I think I had to file one hole elongated but can not remember how many holes I had to drill. Its at least 10yrs ago but the S/H Chonda still is going strong. I think I would have worn at least one Briggs in that time.
All the best
Jeff
