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mike ,thanks for the reply, dyno sheets confirm 280 before headers ,may be someone has had a play before me .i do have the history of the car, but nothing that confirms any mods. do you know of any air cleaners that are of low enough profile to fit under the hood, as the car is very original...

I have a 78 L82 that is putting out 280 hp. according to the owner before me the car was stock standard, however after having a set of mandrel bent headers and a 2 1/4 inch twin pipes it was very obivious that the engine has a cam. my question is did they come standard with any variations ...