[Fot] TR 6 spin on adaptor

[Greg Blake]

We are refreshing the Texas endurance TR6 race car after its mishap at COTA last year. One of the tasks on the list is to add an oil cooler. We have the spin on adaptor with no connections. Can I just drill and tap the two bosses cast into the base of the adaptor?  Looks like 1/2 NPT would work with the casting. Any advice from someone that has done this before?  How deep do I drill?  Risk of breaking through into adjacent passages?  

Thanks

Greg

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