Copied from (http://www.moparstyle.net/history/rbmotor.htm)

413 CI V-8 RB Wedge

The 413 was first introduced to the Chrysler division in 1959, and Dodge and Plymouth in 1961. Desoto was saddled with the 361 CI in its last year. Bore was 4.187-inches, stroke was 3.750-inches, and it was rated at 350 HP with 470-lb. ft. of torque. Race-spec longram intake versions cranked out 375 HP and 465 lb. ft. torque.

In 1962, the 413 became a single purpose drag race-only engine. Equipped with either 11:1 or 13.5:1 forged pistons; high-lift, long-duration, solid-lifter cam; large-port heads with 2.08-inch intake and 1.88-inch exhaust valves; dual fours on a crossram intake; and high-flow, upswept exhaust manifolds – this engine made between 410 HP and 420 HP and was called the Max Wedge.

In 1963, the Max Wedge 413 was dropped in favor of the larger Max Wedge 426. The 413 in a tamer version lasted through 1965 in Chryslers, and 1970 (with different heads) in Mack trucks.

the truck engines most generally have dished pistons, and small valve heads. this combination was used for lugging power, not the cranking power that a more potent car engine has. look in the chiltons truck manual, it will list your info.