I understand the sentimental value of keeping and using the 440. If it were me, I'd look for a decent A body from 1967-1976 with a solid body but no drivetrain and build the 440 into a 500 stroker, and using a built 727, and maybe a Strange S60 with 3.54 gears, toss them into a 3,000 lb. car. You'd have a hell of a street rocket and tire-frier! I think that'd be the best bang for your buck, plus not to mention the fun factor. Hot streetcar, car show cruiser, and occasional trips to the strip.