an f350 regular cab with a 3 yard dump is actually not that bad on driveways, I do it all the time. No its not the "best" but it is better than having multiple vehicles when you do not need to. Its actually shorter than my pickup because it is 141" wheelbase and my pickup is 158".
I know its not "legal" but i have put 10 yards of mulch in mine....
If you listen to others advice and get an old truck you may switch to a more reliable engine, but youll be getting a significantly less reliable truck everywhere else. If i were you i would look for a 2002 or 2003 F350 one ton with a small dump body in great shape. Or a 2011 or newer F350 with the 6.7. Or a chevy duramax dump as new as you can afford.
All those repairs you did on the engine of the 6.0, you will be doing the equivalent to a dodge with a cummins, not on the motor but everywhere else. IMHO ive NEVER had good luck with dodge and neither has anyone else i personally know