[Aircobra101]

so some genius in jap decided to thin jam zinc plated pipes into the manifold and into the outlet pipe.
doesn't look that good 40 years later once some ausie farmer starter running water thru it
two are approx 8mm and another 2 approx 15mm
so i founds some brass screw in fittings at supercheap for which i reckon i could tap the holes.
3/8 will work as that's about 10mm, but no luck for the bigger as the biggest fitting seems to 1/2, which is too small for the hole
surely some has done this before
newsflash
found some
7.94mm (5/16) with 014 inch thick wall.
16.67mm (21/32")- still too smal