Need 273 Steel Head Gasket

I'm here to tell you can run the Felpro gaskets on a 273. I've run them on 67 down small chambers, 67 up chambers, and even on 1.88 J heads. If you run full advance, 35 total, your 67 down heads with 2 barrel pistons 273 will still ping if you run regular. After 30 years and 300,000 miles they still don't weep fluids or need retourqued. If you can afford Cometecs, yea they would be great, but you don't need them...