OK,

Finally getting started on this project and ran into a brick wall. The specs call for 4 7/8" from the firewall to the back plate of the spinner. This puts the back of the YS .91 almost against the firewall. And with the stock mount there is stuff hitting before I'm even close.
Who has this combo?
What kind of mount did you use?
How much does it kick a**?

Thanks

Picked up a Dave Brown F120 mount from my LHS. Attacked with a cutting wheel and it worked perfectly with 1/16" to spare