All on a 98 TJ:

I'm considering buying an A/T Rock Slider Rear Bumper by Olympic. I've
heard good things from the group about it, but just wanted to make sure
of one thing, .. a stock spare-tire will fit with no problem with this
bumper on, correct?

Also I thought I read somewhere where this bumper doesn't mount
directly to the frame, and that you can't get pulled out by it. . Also
correct?

I'm doing some maintenance and upgrades all at once here.. and was
wondering if anyone had any $.02 to add.. hints, tricks, etc. .

I'm going to be installing a Borla Header to replace my cracked stock
manifold. Seems pretty straightforward, any hints?

I also bought a seal-kit for the output shaft on my steering-box, as
it's been leaking for a couple months, and is getting steadily worse. I
thought I read a post on here a while back that it was a fairly simple
job, with the worst of it being getting the pitman arm off..

My front Diff. has a small leak which I was told is probably my
pinion-seal. Looking at the FSM, it seems fairly easy..It doesn't
appear there are any other seals I'll need to buy, do I just buy the
pinion-seal, and that is enough?

Besides these, I'm going to replace my serpentine belt as well as my
steering damper.

Thanks in advance for any help anyone can give!

-Dave McGlynn