Having a 37 with seemingly hundreds of clutch head screws, I found there’s about a half a dozen different ways to get them out. If it’s in an area that is safe enough, nothing works as well as heat. 88 years of rust breaks loose the best with heat. If a couple of the simple ways don’t work, and you can get to the backside, which you often cannot do, I would drill the head off and use vice grips on the backside.
