I found Doorman, Mr Gasket and Arp bolts, and yes, they are cheap. I'm not really looking for the original bolts, since metallurgy on those days is not as good as today, but what caught my attention was the use of 300M steel (stated by the parts manual) which exceeds some specs of grade 8 standard material. Have you used them? Does the above bolts have the recessed shoulder also, or just the thin heads?
