The electronic versions of the electro mechanical should work just fine.
Electro mechanicals have 2 to 3 wire wound resister underneath them.
The electronic versions typically do not.
BUT... be careful when asking for an electronic vs electro mechanical.
In 69 or 70 the electro mechanical and it's associated alternator was replaced with a different alternator and an electronic VR that are NOT interchangable with the earlier ones.