Dodge and Chrysler built industrial stuff and heavy duty stuff to last. As a result, the HD and industrial engines had limited horsepower.

413 or 440, each has a 3.75 stroke and pistons that weigh about the same. So, each is capable of the same redline, assuming valvesprings and ignition keep up.

The carb wasn't very big, so it needed small jets. You can bet the engines were set up to run rich for self protection. So, increasing jet size is probably a step in the wrong direction.

I wouldn't be surprised if that carb would work just fine with a regular carb baseplate.

R.