Around town, sure, but it'll be a damnuisance on the highwayÂ…the engine will be screaming (and guzzling fuel).
70-Challenger, it'll go best if you will figure out and write down exactly what you want your car to do that it doesn't presently do. Not in terms of which parts are under the hood, but in terms of performance, driveability, economy, steering, stopping, etc. Then post your goals here and/or on the
slant-6 board and you'll get good quality advice steering you towards the most effective and cost-effective mods to make, and in what order.