First of all, stay calm. Welcome to the world of working on cars. And that was not to be mean. Some starters need to be shimmed. As far as the bolt holes, any configuration will work with your block. Some starters even had one short bolt and one long. If you are not happy with the look of the new starter, see if you can return it. Did you bring your old one with you to match up? Again, the new one you got should be fine. (Without seeing it). If you decide to try the new starter, I have found that one shim between the block and starter is a good starting point. Should the starter “grind” more shims are needed till it stops. Hope this helps.