I don't know i had a 406" 12.5 to one with pink rods and ARP bolts, i put about 20 passes on the motor running 7200 rpm shifting at 6800 no nitrous then switched to alcohol and a toilet bowl and went about 12 passes and broke a rod, funny thing it broke not on the beam but just above where rod bolt comes thru, i'm thinking not more than 550 HP in the motor. I know for 3 or $400.00 after market is the way to go, now B/BLK 804 rods are a different story.
JMO
Zip.