Hi Jeff I have seen short shaft Briggs on Victa bases, but the motor has been turned sideways so the fuel tank is at the front, no idea how they got on with the bolt holes, never bothered looking and from memory the ones I have seen were probably vertical pull start. All the other Briggs fitted on a Victa base need the spacer because of the fuel tank fouling on the chute. Here is a pic of a couple of them one plastic, one alloy, the plastic one is more common. The plastic one shown is missing the spacer sleves but you get the idea. I have seen plenty that have had the motor packed up on nuts or a pile of washers
