manley 1.5" exhaust valve:
Exhaust Valves
Type: Exhaust Valve XH-426 Material
Head Diameter: 1.500''
Stem Diameter: 11/32'' / 0.3415''
Installed Height: Stock
Overall Length: 4.911''
Tip Length: 0.250''
Underhead Angle / Radius: Pro Flo 12° x 3/8''
Margin: 0.060''
Seat Width: 0.100''
Top of Head: 7° Dish
Weight / Grams: 89
manley 1.84" intake valve:
ntake Valves
Type: Intake Valve NK-842 Material
Head Diameter: 1.840''
Stem Diameter: 11/32'' / 0.3415''
Installed Height: Stock
Overall Length: 4.911''
Tip Length: 0.250''
Underhead Angle / Radius: Pro Flo 10° x 3/8''
Margin: 0.060''
Seat Width: 0.080''
Top of Head: 5° Dish
Weight / Grams: 104
they both use a 3/8 radius but the underside angle is 2 degrees different as well as the seat width being larger for the exhaust valve. I'm assuming the seat is ground at 45 degrees anyway so this would be set to whatever you would like when the valves are ground