I run a Demon 850 cfm in my Duster, but my horsepower level is higher
than your application. That said, I would use a Thermoquad, on your 340.
Get a hold of Scott, as others have mentioned, he can set you up with a nicely restored Thermoquad that will perform well. twocents
BTW...what combo did you use in your 340 build? IE: cam/compression/pistons/intake/headers/manifolds,etc?? Just curious!

Last edited by RoadRunnerLuva; 06/25/18 02:59 PM.
Plymouth Makes It!