Clutch replacement and oil in radiator

Here is the new problem...
Changed all fluids and cleaned a lot of outside while rebuilding. When changing the radiator fluid, I found oil mixed with it this time.

I plan on changing again and seeing if it is in there again.

If it is what should be my plan of action?...
Remove hood and gas tank, wire conduit, spark plugs, exhaust manifold, and then pull the head off... check head gasket and possible cracks in blocks?

Any ideas what most likely is the problem?

I really didnt exert a lot of pressure using that com-a-long it was just easier since it was a one man job.

I rebuilt the carb also and cleaned up the air breather too.

I had to reopen the carb three times to add/adjust parts in it but when I finally started her up, I havent had to make one adjustemnt.

She runs great!

Thanks to everyone out there who helped.

Since yer N-Radiator water is almost at eyelevel, and outdoors, you will see reflected some natural oils floating ontop of yer anti-freeze. Most of this "oily film" is natural combustion by-products forcing itself past a leaky head gasket. It is NOT engine oil. There is NO engine oil passages thru yer headgasket.

The ONLY-WAY to completely gitt ridd of oily deposits in yer engine water jacket and radiator is to do an engine flush with caustic wash. As a general rule, unless yer sphincterly challenged, it ain't worth the time and effort.

Howsomevers; its always good practice to re-torque yer cylinderhead bolts (70ft/lbs) to prevent headgasket leaks. Unless it is already too late. The ONLY-WAY to tell iff'n you have a headgasket leak is to do the dreaded compression test. ...or... find a chemical analysis test kit for combustion by-products. Ask yer Snap-On man, or radiator shop..... ...Dell

However, there was more than an oily film when I drained the radiator.

It was black.

However, let me flush a couple times, it could have just been really old.

New question...
Is there any problems with running only water in the radiator? Does there need to be some oil in it to lubricate the water pump like you stated in your response?

If the oil is OK, and all you have is an oily film of combustion products on top of the coolant in the radiator, it may be worth trying to retorqe the head before going through all the trouble of changing the gasket.