If it's a gas engine, doing an inframe, I would go back with the old bolts and nuts. No locktite, just clean everything up, oil the threads, torque to specs.
When torquing, you will feel the bolt come into torque. If it continues to stretch, not come up to torque, or binds up before it pulls tight, there is a problem.
I've put many, many engines back with old bolts, never had a failure I could blame on a bad bolt. For a more serious, complete rebuild, or performance build, then the rods get reconditioned with new bolts. You don't take the bolts out once a rod has been reconditioned, it will change the shape (I tried it). So wouldn't the same apply to an old rod?
If there were a rod bearing failure, then the rod will need to be reconditioned. But then the crank will need to be corrected, so that rules out an inframe.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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