I think the 330 engine is the different then the 300 which is the 5.9 that goes in the Dodge pickups if so it's a plus. Which allison trans does it have I'd prefer the 6 spd over the 5spd.
As to the tires look for the date code on the side of the tire you should find the letters DOT then in a box behind the letters will be 4 numbers the first two are the week the second two are the year ( example 1316 would be 13 week of 2016, 2406 would be 24th week of 2006) The numbers are only on one side of the tire so if you can't find them on the outside of the tire you need to look at the inside. Most replace their tires when they are about 7 years old.