These work wellYeah, this is what I picked up. There's a very thin layer of steel in the middle, and the coolant ports are different..
Find Fel-Pro Performance Intake Manifold Gasket Sets 1262S3 and get Free Shipping on Orders Over $99 at Summit Racing! Most Fel-Pro Performance intake manifold gaskets have Printoseal construction, which puts beads of special elastomers around the ports for extra sealing power. They also...www.summitracing.com
...and note post below stating the thicknesses offered based on the suffix1262R has been superseded to 1262R4. They have the exact same dimensions and material construction.
Fel-Pro Answer - May 20, 2019