Fiat 131 Racing 1981 Cylinder Head Gasket

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Months ago the engine of my 131 Racing died I had to rebore, etc. We are now in the process of assembly and yesterday we started it for the first time. While reviewing the engine we noticed that the exhaust cam shaft is receiving a lot less oil than the intake one. We think it may be due to the head gasket. Since the 131 was not produced in Argentina, we had to use one made for a Regatta 2.0L engine (http://www.taranto.com.ar/home/pdf/pdf/Fiat/260100.pdf). Perhaps it obstructed an oil chanel. It would be a lot of help if we could have a photo or drawing of the original 131 2.0L gasket. This would be a lot of help since we could check if the one we used is the same without having to reopen the engine. Any help will be deeply appreciated.
Regards