The intake valves that were in my 302 head when I got it had an OD of 1.856". When I had the head rebuilt by Texas Engine Machine in Llano, they replaced the intakes with a small block Chevy intake valves that measured 1.841", but still more than covered the seat area in the head. Sorry, I don't know part numbers or maker of the valves.

'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.