We've changed rod bolt's in the car many times. Never a problem or failure. Just change 1 at a time,torque,move on.
There is a big difference in clamping force between head bolts and head studs. We run bolt's on NA cars and studs on FI cars. We run the factory gasket (seen no need for the more layer ls9's) and over torque them to 85 ft/lbs with the arp lube. It just works.
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