Mopar 383 with 440 crank!
Dropping the 440 crank in a 383 makes it a 426 at std. bore but if I'm not mistaken the main journal size is larger on a 440 so you'll need to have the main journals turned down to get the crank in and finding pistons that will put the compression ht. where you need it might be costly (custom=expensive) since all 426's were based on a RB block. Never hurts to crunch numbers but if I had a guess I'd say it'd be cheaper to buy a 440 and rebuild it and sell the 383 block. Sorry I can't expound on how well a 426 low deck would run cause I have never known someone that did it but I don't see why it wouldn't run good given the proper parts are selected