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Old 06-01-2003, 07:22 PM   #5
HotRoddin
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Join Date: Sep 2001
Location: Longview Texas
Posts: 683
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Quote:
Originally posted by 82 GT
That price is for both heads.
I was thinking about going with Thumper heads but I think these heads will be much better for a 351w

If I get those heads, will my pistons need to be flycut because of the larger valves?
As far as notching the pistons goes, there are so many head, piston, gasket, valve, cam combos its almost impossible to say for sure.... you need to measure it.
I'm not sure about the parts in your sig but if thats a comp 292H cam you're talking about then you may be pushing the envelope with the Jr's on a 351W ... thats getting up into the mostly strip cams ... at 292 advertised duration, you need 10.5:1 compression at least and that motor won't do squat under about 3500 RPM ... If you have an automatic without a high stall converter, forget about keeping it idling at stoplights, and forget about power brakes! Also you're way out on the ragged edge with that 625 CFM carb and the performer manifold. If you ask me ... and i know you didn't but i'm tellin you anyway If that is in fact a 292H cam you're talkin about you need to either rethink that and tone the cam way down ... OR ... if its gonna be a mainly strip car ... go up a notch on the heads (maybe the Sr's instead of the Jr's or even better a set of AFR's ) also go up on the carb ... with that cam and the RPM it will require on a 351 you'd be way better off with a 750 CFM , or 650 CMF minimum, Holley or Demon. If its an automatic a 3500 stall converter, and some gears, i'd say 3.73's at least . Otherwise as a street racer that potential beast is gonna be a dog. Thats my 2 cents
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