sometimes you can find NOS bolts, but unless they are completely ruined you can use them over, think about how little is actually going on in one of these engines. What is it, 5-1 compression, at 3500 RPM max? Not a whole lot more stress than a briggs and stratton. But the deciding factor will be if you can find them or not. And you can check for yourself, but when I checked, ARP can't get all the sizes you need. However I was also looking for main cap bolts too at that time. Maybe it was the mains they didn't have (?) I ended up with studs at any rate. I had a 1936 206 head for a long time, but sold it recently ....
