Yep, need to hog out the bolt holes on the intake. Your now has smaller bolt holes and at the wrong angle. So try drilling them bigger and at the right angle...find a 318 intake.
Tricky part is allowing the bolt head to sit flush on the intake once seated. Need to flatten out the hole on the intake.
Its best to let a machine shop do it but $ spent isn't worth it. If it was a D-64 dual quad intake I would just let a pro do it.