62galxe (4/14/2009)
...can a grade 8 bolt be used in place of the head bolt... You know, we are so acustomed to using ARP that we forget, ARP bolts weren't around back in the day. None of our engines came with ARP, and they worked just fine.
Sure, you can use another brand or style. I have used socket-head cap screws. They work just fine as long as you get the proper grade bolt.
I learned a huge lesson dealing with aluminum heads, and galvanic reaction. USE STEEL WASHERS. I have never seen a washer used on iron heads. But on my 351W w/Edelbrock heads, I broke two sockets trying to take 1/2" ARP bolts OFF! One was a Snap-on impact 6-pt. 9/16" deep socket (it rounded-out), the other was a Craftsman (it split). My torque wrench was clackin' at 150 ft/lbs. I put all the bolts in a baggie and sent them to ARP. They replaced the 20 bolts with a free set, which included hardened washers. I know I tightened to 100ft/lbs., 15 years ago. That set didn't have washers.
Moly lube on re-chased threads are a must. Be real careful you don't bottom your bolts. The head will be loose, and impossible to remove (if you break one). Hope this helps. - Dave