Big-Block Mopar Engines - In With The Old In With The New

The 505-inch Mopar looks great on the dyno, and pounded out some surprising power with the old-school dual-quad intake. Headers are custom 2x32 inch units from Stahl, while the remote screen-type oil filter is from Racor.

Paul Roberts at Grays Automotive in Tigard, Oregon, got the motor installed on the dyno and ready to run. Roberts also performed most of the machine work on the short-block.

The Mopar high-rise dual-plane intake and Holley 1,000 HP combination weighed the same total weight as the dual quad intake at 32 pounds.

We swapped over to the Mopar dual-plane intake to see how it would compare to the dual-quad setup. The motor liked the high-rise Mopar intake and picked up 20 hp.