2176 help ASAP

We are putting a 2176 on my 74 Dart 318. It doesn't seem to want to sit down all the way. There are pins going through the intake gasket on the block. One in front and one in the rear. Do I need to pull out or cut off those pins? Or if it's something else please help. My brother is only here til tomorrow morning and we gotta wrap this up. Thanks