Starter differences for manual and auto?

[franken]

I have a truck (SM465) and a car (Muncie) with the iron nose starters with short bolts that go into the bellhousing, but I've seen plenty of aluminum nose starters that use long bolts that go vertically into the block. I'm sure the bellhousing and starter style on the car weren't what was used on the car was built. The same could be true for the truck.
After typing all that crap I wonder if it made anything more clear...