I've used the stretch method for torquing rod bolts for a lot of years now on ARP and other "quality" bolts. The ARP 8740 bolts and their 2000 and L19 bolts all had some minor length differences in all of them whiney shruggy Say from .0003 to .0050 shock shruggy
Set the dial indicator at zero for each bolt individually and then stretch them, tighten, torque them and remeasure them for the proper lengths wrench scope up twocents

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)