I have an old 1960s era exhaust manifold with the square heat flap counterweight. I am contemplating using it on my slant, but I have a concern. When I got it, the heat flap was frozen solid. Using heat, lots of penetrating lubricant, and some persuasion from a hammer, I got the flap to free up and move mostly freely. On closer inspection I discovered that the flap freed up because the bushings on both sides of the flap shaft came loose from their press fit in the manifold casting. The bushings are still rusted solid to the shaft but spin freely in their bores.

Any suggestions on a way to use this manifold (a) without a leak around the shaft and (b) keeping the heat flap intact and functional? Would it be possible to fully disassemble the flap assembly and press the bushing off the shaft and then back into the manifold? I know the rebuild kits for these are no longer available.

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Casually looking for a Clifford hyperpak intake for cheap.

The flaps are welded on in the middle. So some grinding and then rewelding needs done


I have a stock manifold that I am going to scrap. It has the round counterweight from a 1974.

It is tight but does turn.
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http://www.youtube.com/hyperpack

Argh. OK, I will just leave the current exhaust manifold on the engine. Thanks for the offer on the manifold, but I think shipping would kill the deal. I have two more spare exhaust manifolds with free counterweights but broken bolts in one or more of the three connecting bolt holes.

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Casually looking for a Clifford hyperpak intake for cheap.