Early A Body HP 273 exhaust

The 273 "left side" exhaust sometimes hits a small
external "boss" on the 318 block.

I ground the "boss" down with a grinder,
but still had a minor exhaust leak.

A Copper exhaust gasket on the drivers between the engine,
and the manifold fixed that. :)

SUM-111420

http://store.summitracing.com/partdetail.asp?part=SUM-111420&N=115&autoview=sku