Hi I have a 1968 440 magnum in my father's 70 roadrunner and he forgets what exactly inside of it he knows it have a after market cam and it's bored over .30 it has headers and duel pipes with a holly carb the motor from the factory made 380hp the nearest dyno is 5 hours away and wondering if anyone has a similar setup and how much hp? I know it's hard there's so many variables but dosnt hurt to ask and it's running off pump gas thanks.

 

Need a lot more info than that. Cam specs, compression ratio, and any other changes from stock.

 

The 440HP was 375hp from the factory.