The paper one is for A bodies (we just bundle all 3 cause i could never nail down exactly what year/models got what).
If it were me I'd put one in there. Why would one be required on a manual master cylinder between it and the reinforcement plate and not on a power brake booster?
pushrod clearance issues
Agreed, seeing that the clearance spec is .020-.060, one could still use a gasket, but the gasket crush would have to be known in order to determine the assy length value, meaning assy, disassembly, measurement, adjust, re-assembly, ...something I think a vendor supplying a line item in large volume would not do IMHO....
