If the head gasket is installed wrong on a y-block (tabs to the rear of the head instead of the front) will that prevent oil from getting to the rockers?

Thanks

That's the funny part, the motor does not overheat. I have seen conflicting opinions on this issue and wanted to get it cleared up before I pull the head off to replace the gasket. I have done many checks to make sure the rockers were not plugged up. I have lots of oil to them on the drivers side and none on the passengers. A couple of years ago I installed a top oilier kit on the bad side. I have not pulled the head off to check if oil is getting up through the block yet but I suspect someone before me installed a cam bearing wrong. I was just wondering if the head gasket oil passage hole could be misaligned as it looks like the gasket is on wrong. Again, the motor has never overheated on me. It looks like it has a 160 degree or so thermostat and that is where the temp runs most of the time.

Why not pull off the rocker shaft and insert a small rod down through the hole where the oil comes up from the cam and see how far down you can go. You will know if the head gasket is on wrong if you can not get past the head . You might want to use a long drill bit and if you have to cut through the gasket . It's just a thought