Never mind - think I have it sussed - manifold fitting is actually 1/8 as it turns out - found a 1/8 to 3/8 barb hose fitting.


'51 Chevy 3100 Truck - OEM 216 Engine; three speed column shift transmission
6 Bolt disc conversion with dual master/vacuum booster
12V alternator conversion.
235 engine in waiting grin