I've got some data from Howards Racing Cams for our 6 cylinders from back in the day. First I know nothing of these cams how they worked or anything other than the information on the sheet.
375 Grind Timing: intake 18-43, exhaust 53-10, lift for both valves .375, clearance: intake: .010, esxhaust .013
It was listed as Full race cam to be used primarily for street use or jalpy racing.
410 Grind Timing: intake 23-43, exhust 58 or 56-18, lift for both valves .410, clearance: intake .010, exhaust .013.
It was listed as full race cam for hard top and sprtsman track racing. Can be used as a full race street cam.
The pricing was for the Cam only with exchange $50.00