if you pull the old starter, it should have a manufacturer's tag on it somewhere. that will give you all the info you need. also lets you bench test to make sure it really is the starter. finally, you'll have the core with you that you can compare to what they pull off the back shelf & avoid the return trip for the core charge in the miraculous event that they actually have in stock and pull the right starter for you. if you can't find one available in stock, see who does their rebuilds & you might be able to take it there for the internals.