Pressurized crank case?

The engine was rebuilt before I owned the car. It's not a fresh rebuild. It's a stock engine with the exception of what sounds like a mild cam. The exhaust is all stock.

A compression test is next on my agenda, then possibly a leak down test. I was told if the compression results are poor, there's no point in doing a leak down test. I'll check the hose from the PCV to the carb, then pull the carb if I have to as well.

I also heard that blown head gasket, or cracked head or block, could cause my crank case to get pressurized.

Thanks again, guys.