I suggest:


1. Put a dab of paint/grease on the fitting that is causing the interference.
2. Bolt it on as best you can finger tight with equal gap all around.
3. Note the gap width as it is equal to the relief needed minus the gasket thickness.
4. Insure you have a bit of paint transfer and you know where to grind.
5. Use a die grinder to gently create a divot and repeat the process a few times until it sits flush. You should still have plenty of wall thickness left but compare the relief required to the overall part thickness before starting.




1952 1300 Canadian 1/2 ton restomod
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