I have got a 70's Smiths dash top oil pressure gauge for my 1970 Viva HB. I need to get a T piece as nothing is compatible I think the pressure switch thread is 1/4 inch but to be honest I've no idea what size it is all I know is the threaded hole in the block is miles bigger than both the T piece and the union on the end of the capillary tube.
The thread in the block is 1/4" NPT, the T will come with a 1/4NPT in the top to take the switch again and have a 1/8" NPT in the side for the pressure pipe. You will also need a 1/8NPT adaptor for the side of the T piece and a nylon oil pressure line OP-15 for the Viva HB.
Archived in: Caerbont Gauge | Smiths Gauge22nd March 2016
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