W2 408 build

W2-1969Dart said

Very nice build . Are you using 2 gaskets to get the valve covers to clear. I would be curious what the dyno numbers would of been with the stock exhaust manifolds to keep that stock appearance

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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.