Yeah, if you've been cranking it, it should be oiling both sides. Incorrectly installed cam bearings or a head gasket that has no oil through port are the only things I can think of that'd cause no oil to one side. Since it's most likely the head gaskets were bought as a pair their less likely to be the problem unless it was defective. You can tell if that's the case real easy by taking off the rocker shaft and running a straight wire down through the oil hole. If it only goes in 4-5" the head gasket is the problem. If it goes in a lot farther (8-10") it's the cam bearings.
