Just be sure to take loose the starter while your head is not under it! I know I only say that because I left my head in the way, I had the little red dot of india in the middle of my forehead for a week! My buddies could not resist all the joking. It is easy to do especially if the starter is somewhat stuck in housing you may need to pull on it a bit to get it loose. I found its harder to get bolts started than getting them loose. Get you a swivel joint and about a 8" extention you will be allright. You will get it no problem.
Get as many different length extensions as you can. A universal swivel and/or wobble extension might help as well. You'll need to figure out what combination of extensions works for you (I think I used an 8", a 3", and a universal for one of the bolts).
Be patient, as you might only be able to turn the ratchet a click or two at a time.
just finished one on a fox sunday.the top bolt was a pain i started it by reaching in from over the engine and reached around the header and put a 1/2 turn on it and than went under the car with a bunch of extension and a universal joint and tightened it down.leave the bottom bolt a little loose it makes putting the top one easier. phil