Gas mileage, anywhere from 11-14 not towing, 6-10 towing. MPG on our trucks can vary drastically among our trucks.
Ticking when cold is most likely manifolds are cracked, which means they need to be replaced. Some guys have repaired them, but replacing with headers is the best option as manifolds will just crack again.
300k is not uncommon on these trucks if they're taken care of. The engines and transmissions are built to last, you just have to keep up with all the other small shyte that breaks along the way.
I'd also suggest venting the rear axle if it isn't already. Those get clogged, especially if you're dropping a boat in the water multiple times.
Ticking when cold is most likely manifolds are cracked, which means they need to be replaced. Some guys have repaired them, but replacing with headers is the best option as manifolds will just crack again.
300k is not uncommon on these trucks if they're taken care of. The engines and transmissions are built to last, you just have to keep up with all the other small shyte that breaks along the way.
I'd also suggest venting the rear axle if it isn't already. Those get clogged, especially if you're dropping a boat in the water multiple times.