Just thinking outside the box today
Here's the results of the valve stem diameter test. Tests were run back to back on a ported SBM steel 587 head from a 1973 360 motor. Valve diameter is 2.02. Single 45 degree angle on both valves. No backcut. First valve was a Hughes 3/8 valve with an 11/32 reduced stem. Second valve was an Edelbrock 11/32 with a 5/16 reduced stem. Both valves are nail head and appear to be similarly shaped.
Here's the results of the valve stem diameter test. Tests were run back to back on a ported SBM steel 587 head from a 1973 360 motor. Valve diameter is 2.02. Single 45 degree angle on both valves. No backcut. First valve was a Hughes 3/8 valve with an 11/32 reduced stem. Second valve was an Edelbrock 11/32 with a 5/16 reduced stem. Both valves are nail head and appear to be similarly shaped.
