Mopar R1 block

I also forgot to mention that when it comes to Rod bolts, the guy who owns MGP rods just said in an article that he doesn't advocate stretching Rod bolts. He rather you use a torque wrench.

When you stretch the bolts to the same length, you may have one bolt that is actually torqued to say 65 pounds, and the other bolt on the same Rod may be torqued to 78 pounds. They are the same length now, but the load on the bolts is completely different.

And that means the big end is not only not round, the thread load isn't equal.

And, almost every time you stretch a bolt it will change the torque required to get the same stretch, so even if you stretch the bolts and size the rods, when you go to assemble the rods to the crank, they will torque to a different load than they did when you sized the rods and the big end is again, no longer round.

I learned this in 1995 and haven't stretched a Rod bolt since.