Oh, I was just suggesting that you might be able to find out what steel ARP uses for the stretch/strength qualities they want, get some rod stock and have it threaded at both ends a la ARP.
Take this advice with a shaker of salt, but...I would guess the head bolts across an aluminum head are more likely to need the TTY-style bolts, because of thermal expansion of a thick aluminum cylinder head. IIRC, the thermal expansion coefficient of Al is almost twice that of cast iron. So it may well be that you can re-use the bearing cap bolts. My understanding is that when you torque them properly, you're not ACTUALLY going outside their elastic range, you are purposely not doing so. So they shouldn't have actually yielded, unless some thermal expansion caused them to stretch past the yield point.
My Unimog, though, had a cast iron head, and they strongly recommended not reusing the old head bolts, claiming they were TTY. I reused them anyway on one trip (out of necessity), and it never had an issue after that. Torque sequence went just like they were new, too. So I suspect it was a CYA thing on the part of Ma Benz.
Take this advice with a shaker of salt, but...I would guess the head bolts across an aluminum head are more likely to need the TTY-style bolts, because of thermal expansion of a thick aluminum cylinder head. IIRC, the thermal expansion coefficient of Al is almost twice that of cast iron. So it may well be that you can re-use the bearing cap bolts. My understanding is that when you torque them properly, you're not ACTUALLY going outside their elastic range, you are purposely not doing so. So they shouldn't have actually yielded, unless some thermal expansion caused them to stretch past the yield point.
My Unimog, though, had a cast iron head, and they strongly recommended not reusing the old head bolts, claiming they were TTY. I reused them anyway on one trip (out of necessity), and it never had an issue after that. Torque sequence went just like they were new, too. So I suspect it was a CYA thing on the part of Ma Benz.