[Steeveedee]

I remember that you did some work on the head. Did you check cam lift against the spec, before? That I don't remember. But I think that it should pull hills better than that. You've pretty much covered the bases with a stock carb and exhaust. If the compression is good, I'd look at the cam lift. Not fun to replace, since the grille comes off or the engine comes out. If it turns out to be the cam, buy new, not reground.