655 Deck and Blade Question

[Orezona 0]

Hello, I just purchased a really nice 655 last weekend and am in the process of learning as much as I can about this little beast. Is there a set of mulching blades.  I measured the deck at 32".

Also, should the deck be level front-to-back at cutting height or slightly lower in the front?

Lastly, the rear wheels on the deck touch the rear tractor tires when in the full up position. It appears I can correct this by tightening the nut on the front adjustment rod. I this correct?

Thanks in advance,

New 655 owner.