Big Block Chevy Head Bolt Markings

[SuperNovaSS]

Does anyone know which head bolts markings are correct for 60's-early 70's Big Block Chevy engines. I have a customer looking for a set of head bolts for a 67 Camaro he is putting together and I am not sure which bolts are correct. I have looked at used sets I have bagged up that I have pulled off 1970 and earlier BBCs and they look to have a mixture of the markings of the NOS bolts he is looking at(pictured below). Are any or all of these marking correct?


Thanks,

Jason [img]<<GRAEMLIN_URL>>/youguysrock.gif[/img]