Indy says the water blocks are good to 1500. I think Bob,the guy with the Procharged 69 Dart broke an early one but he was at 1800+ hp on alcohol.
That's a lot I know of a ford fellow racer that runs a dart block with a turbo that run 1500 hp but he has concreted the block O-ring the heads/block , thought that was a bit much but.
