IMO, anything that makes the engine look better, while providing quality reassurance, is not a waste of money. That being said, it's usually my customers money that I'm spending. Still, I always try to install new bolts where ever possible. It's difficult to tell a bolts strengths and weaknesses by sight, touch and feel. I figure metal is weakened, over time, by being subjected to extreme temp. changes. Engine bolts, for their size, are very much subjected to this, as well as the torquing of how many others? Chris, if I could, I'd buy you an ARP engine kit, but I can't quite afford that this week (Winter Nats on Sunday!!). If it was a small block Chevy for your sisters Caprice wagon, I'd say keep the old bolts, but for your 'stang, I'd go with new ARP's where ever you can. The 12pt SS bolts not only look great, but they make adjustments in tight quarters much easier. Plus, once you buy ARP's, you won't have to have this concern again in the future.
Take care,
-Chris
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