The engines have different combustion chambers and compression ratios. I doubt changing the distributor will make a difference on a low compression engine. I'm sure you could change the weights/springs. I have several 3.5/4.5 distributors from JY pulls and they all look the same inside.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT