I really appreciate the review. I developed these in response to those crappy SSP's that are on the market.
This whole assembly is not much lighter than the factory weight but the way I have the weight distributed and offset makes a difference. Also for the shift length, we go as short of a...
Looks like you are running a custom made phenolic spacer? If so, that by itself will not seal, you need to run a gasket between the spacer and the head and the spacer and the manifold.
But, I have single runner .093 thick tig / gaskets being cut now. Hope to have those back next week...