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Aluminum or cast iron? If its cast iron, what part number? I have a WP iron block with a 4.15 crank at 484 cubes and will probably be going 572 with it unless I find an aluminum block....Mine is making 660hp so far and I need +700hp to take a 3230lb car to 10.0....On mild gearing. So the whole rotating assemble will be for sale. Getting pricing to do a 572 in my block now, but would rather leave it and swap to an aluminum 572..



My math says 700 HP should be mid 9's at 140 or so.

660 HP should be 9.90's at about 138.
Just my math



My math shows with me in it at 3500lbs total weight, and 660hp at the crank....10.70 which it ran 10.74 last year. This year only 10.95, but it was running lean as I figure out a fuel pressure drop issue.

790hp puts me right where I want to be, so I was going to upsize it...

'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk