I had my machinist put 1.84" intake valves on my 292 head. They are originally for the 305 V8.
Mike G: The L6s and SBCs have totally different timing gear (or chain) covers.

I/I #4101
'71 GMC Jimmy 350, sm465, np205,3.73 posi.
'68 C/10 Stepside 292 (.030 over) Offy Intake, 500 CFM AFB,Clif headers, sm465, 3.73 posi.
'67 K/10 454 project.
'72 K/5 rolling frame project.