Unless it's a 59-60 Chrysler RB383, in which case you could build a factory-appearance 440 2-barrel...

Either setup would be an upgrade, though, provided the carbs are working properly and rod/jetted to suit the engine. The thermoquad would get the nod for mileage, the square-bore Carter gets the nod for adjustability and calibration parts availability.

Parts I seek: driver doorpanel, 65 Sport Fury, prefer black, needs to be 7-8 on 10 scale, might buy set 16" x 6" Dodge truck wheel(s), from early 70s?, takes 9" dogdish - need for a research job so cheaper is better. 69-73 C-body caliper brackets and/or splashields Send a PM.