It's a 1953 88 gas. I don't know what style of rocker arms it has and I honestly wouldn't know the difference if I was to look without some sort of &quot;hint&quot; as to which is what. 

I'll double check the point gap and certainly take a look at valve lash before I go right to pulling the head. It could have &quot;clickity-clack&quot; rockers and as loud as the exhaust is I might not be able to hear it. I'm wearing &quot;thunder29&quot; ear muffs just to be near it as is... (having spent the last 20 years working heavy jet I'm well aware of &quot;hearing conservation&quot;.)
Once I figure out a parts order, a new muffler is top of the list. I would like to put on the underhood version. 

I do have a compression tester and a vacuum guage. However, unlike a car that has sveral places to tee in a vacuum guage I'm not familiar with where I could plug it in on the tractor manifold.