I always seem to get asked about these head builds often, so I thought it might be interesting to show how I do them. This particular set is a 390 closed chamber casting, I will prep the head and install new valve guides, cut for seals, unshroud the chambers and machine for 1.880/2.190 valves then surface, and finally assemble. The first step is checking for core shift, this is done by placing the intake gasket on the intake face and looking how well the ports line up with the gasket with the bolt holes centered, if they don't, don't waste your time. The heads are then cleaned and magnafluxed, then all the holes are tapped and the chambers are scribed.
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