Single windage tray bolt
Once they have rust pits they will fracture or stretch easier from vibration under a load from being torqued.
Those are junk. Try posting a want ad and what you would offer for them. You may have more luck. There are two style 340 and 318-360. They are getting to be very hard to find in good condition. I haven't found any one reproducing them. We use what is here on customer engines.
Once they have rust pits they will fracture or stretch easier from vibration under a load from being torqued.