Quote:

No aftermarket block. I have both RB and B blocks.
Running a 498 with 720 dynoHP in the Fed, works like a charm!
Setting the valves and one oilchange every season.




I second the motion on the after market block...But at only 700hp, we make more than that on pump gas with a NA RB at 512 cubes...I would do a low deck 400 with a girdle and -500 cubes...Should make a ton of HP, problem being, the 6-71, so a non-stroked RB would be the ticket if your only using a 6-71...Is it a high end 6-71, or a plain jane one?

Friend of mine runs 4.70 with a blown RB in a Dart like a bracket car...but not with a 6-71....


'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