A few things missing from the narrative, but important in your assessment follow. The cage is RaceTec. Probably the best bolt in cage out there. It fits tight against the pillars. We welded in additional reinforement plates to the frame rails, and body. The cage is bolted to those plates. These could easily be welded together. This should not be a concern comparing it to a full welded in cage. I have dyno sheets. The motor is built to 88 specs with KS Pistons (100.5mm) bringing the compression to 10.2:1. The car is putting out ~135-136 Hp at the rear wheels. This puts it at the top of the 944 Spec class. Oil analysis has been done every few oil changes. Belts adjusted very few events.
If you’re wondering why I am selling it, I promised my wife I'd sell the 944 to finance my M3 build. Before buying the M3 I bought another 944 for spares. Consequently, I have a ton of spares.