We are rebuilding a motor for our z, and want to put ARP rod bolts in it, but I'm not sure if the motor we are rebuilding has 8mm or 9mm rod bolts in it. Am I correct in that the rods themselves are different, meaning you cannot use the 9mm bolts in a rod that originally had the 8mm bolts? If I am correct is the bolt diameter the measurement of the diameter of the threads, or the diameter of the neck or head of the bolt. I'm 99% sure it's the threads you measure, but just wanted to be positive before I ordered the ARP set. Also I'm curious what type/brand of rings you guys prefer for your Datsun motors. We are using Deves rings, but wanted to know everybodies opinion on this. We have sourced the usual reference material for the build, but any IT specific rebuild tips would be appreciated as well. Thank you in advance for advice.


Chris