Thread: 6-71 supercharged 302 help needed

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if you want genuine performance then go with the vortec or paxton type blowers so many guys today use .. much more knowledge in that direction .. if you want the 671 for apperance then just build a greatly undertuned motor for looks ..

And on top of that, bottom ends of SB Fords with the OEM cast steel cranks, bearing webs witout enough meat (except the Mexican or Aussie versions) leave something to be desired. Particularly with being overboosted. Now....if you were to use one of the new SVT blocks, and with a billet crank - that would be worth the effort. And, yes, a 6-71 is too much for a street driven small block of any brand.

Originally Posted by IC2

And on top of that, bottom ends of SB Fords with the OEM cast steel cranks, bearing webs witout enough meat (except the Mexican or Aussie versions) leave something to be desired. Particularly with being overboosted. Now....if you were to use one of the new SVT blocks, and with a billet crank - that would be worth the effort. And, yes, a 6-71 is too much for a street driven small block of any brand.

The 6-71 is fine on a a 4- bolt main 350.
As long as you keep the boost to 8 lbs. it will be fine.