I can't see the clutch linkage being in the way but I think you have a built in a problem with the rear crossmember as it could be positioned right where the booster/mc would be located. It may be possible to modify the crossmember and still be able to use one of the aftermarket kits. If you have the stock bellhousing mounted to the factory crossmember you could eliminate the rear one. The stock application did not use a rear trans mount.
Fred
