Thanks, I did use 2 of the rubber reusable gaskets for clearance. Now have some machined aluminum spacers. I do know the first headers on dyno with the egt probes were old 1 5/8 headers with LA flange. Once we switched to the TTI headers we gained 30 some HP. I suspect losses with manifolds would have been quite substantial, even more so due to the LA vs W2 flange missmatch.
