angle

Could anybody with a GT-R tell me what angle the bulkhead between the engine and passenger compartment is. I want to make some brackets for a coolant expansion tank and other items to mount to the upper wall. It looks to be approximately 100 degrees from horizontal.

Didn't find any info on the kit wing on the wiki or the build manual - anyone know what the top, middle and lower points put the wing angle at? Thanks! Best, John