With the increase of NHRA and NASCAR engine displacement regulations to 7.0 liters in 1963, the 413 Max Wedge grew to 426 ...
Granted, a 440ci SixPack V-8 equipped in a small car like the '68 Dart GTS is the same thing as a 426ci V-8 in a '68 Charger ...
This engine had been in development since 1959 and employed "short ram" induction, wherein the carburetors were fitted diagonally on the intake manifold. The "Max Wedge" option was available ...
What makes it so rare? Apart from the Max Wedge engine, that is? Well, it's the convertible top. Dodge reportedly built more than 30 Max Wedge-powered Polaras in 1963, but only three were ordered ...