Mastro Subaru sponsors Project No Cones the CFR AutoX team consisting of 2 Imprezas and 3 drivers.
Do you know Neal Tovsen Will Conklin and Katie Lacie? They have FAR more experience than I do regarding SCCA and dealing with Mastro.

Id drive the Mustang out there if I have adjustable shocks. No way Ill do it with Bilsteins! But if I get Tokicos I may just do it! OR pay someone to let me co-drive their car. I can throw any RWD car around in the sand/muck/mud back home. I even used to go muddin in my 85 Ford LTD and never once got stuck!!!

Ill throw the ideas by someone tomorrow and if you read this which I doubt by tomorrow and you are coming FIND ME@!@@