For your fenders--Krylon Fusion,,,,prep, prep,prep. Clean very well.
Sounds like your lifters are a little noisy, possible sludge, change your oil first and see how it goes.
31.50x15 will fit just fine without a lift.
Point to ponder:
* If electrons come from electricity, does morality come from morons?
* If you have sex with a prostitute without her consent, is it considered shoplifting?