What do you guys think? Im looking to block the exhaust port.
Looks interesting and pulling up actual engine pictures and comparing side by side look like a match.
At 3/8" thick it would be plenty to block the passage. It would bring the intake diagonally up " on each side...and some fraction of 3/8" in toward the intake, but probably not enough to affect bolt hole alignment. I am thinking you would use intake gaskets on bottom and top side, and your bolt will have 3/8" + thickness of extra gasket..so maybe 7/16" over all rise in the bolts. Point being you may want to use different bolts. Other than that, it looks like a solid design, albeit perhaps overkill just to block the center port. Perhaps a very, very slight performance gain in the slight increase in air/fuel travel distance.
I know olsons gaskets has the gaskets with the center port blocked off. That part shown looks to be overkill, and too thick, and will affect the seal.