I needed some valve locks for my AFR #1450 SBF 2.08/1.6 heads. AFR told me I needed a standard 11/32 chromemoly 10 degree single groove lock. Seeing as I needed them right away I ordered from Summit, the Trick Flow TFS-52400445.
Trick Flow Specialties TFS-52400445 - Trick Flow® Valve Locks...