I traded the Duster off several years ago for light weight tube chassis 1970 Cuda that I race now, it is a S/P,S/ST, S/G car that runs 9.0 in the 1/4 mile at Woodburn in the summer off the stop
As far as making decent or good power from a 440 block start off with a good 400 block first and stroke it( I like 4.25, 4.300 and 4.375 strokes ) with a set of really good heads and large carburetor
My Duster motor was 400 block 4.300 stroked motor with 518 C.I. with a set of Indy SR heads with M.W port size intake and a Indy 400-3 intake and a Holley 1050 CFM Dominator, it ran it's best at Woodburn of 9.993 at 134.8 MPH weighing 3450 lbs. with me in it with both the air cleaner and full exhaust on using 91 octane Oregon non ethanol pump swill