400 low buck dont give a

I agree with 65Val. It will be a slug.
Got a car in my shop right now that I could have saved a guy a lot of headache on had he come in before he did the same thing to his 400 in his 74 charger. A cam very similar to the one you want to use,Edlebrock heads and intake, 750 holley, MSD dist. and ignition... damn thing cant get out of its own way.