2.4E vs 2.7S distributor

[ripper911]

My 911's almost back on the road, I'm just waiting to get the distributor rebuilt. I have a bit of a question though.

My car has a 1976 2.7S engine, carbs, etc. For some reason it was fitted with a 73ish 2.4E distributor. It needed a points plate so I brought my spare 2.7 dizzy in and nothing would match up, that's how I found out about this.

Is there any advantage to having the 2.4 unit on a 2.7? I'm going to end up just having them both rebuilt. I'm thinking I should probably put the 2.7 type in since that is the type of engine, unless there's some reason it would have had the other one.