Whaler. Go to
www.stage8.com for the fastners that are tits! I have my engine done in several areas with stage 8 stainless. Every where else ARP. I think @ one time I had figured $800 in external stainless specialty hardware. But for headers at the block and collectors alike, they won't come loose. They have kits or sets available or will put a kit together for the same price. FE stuff is considered oddball compared to sbs etc. Check them out, they are great people to work with. I ordered over a $100 worth of hardware the wrong size and they sent me the right stuff w/o charge and told me to send back the wrong stuff and it wasn't even their error. Don't see that much anymore.