Originally Posted by KOS
well guys I'm having a tuff time finding a aftermarket block so I have a line on a good 230 400 block sonic checked .226 finished bore at the thinnest ...with aluminum caps what HP level do you think I would be safe(reliable) with N/A??


Well, my little 400/512 build has been great at 755hp with no signs of any issues since adopting new valve train....I would go a bunch more if you keep the rpm reasonable and hit the tune up right. Mine is not filled, only has a girdle. I have been contemplating a 383/496 build with an F2 at 18psi....So I might be able to let you know at what point it lets go......

Last edited by Dragula; 09/01/19 08:34 PM.

'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