So I've done some boning up on HEI distributors... many thanks to those that got me pointed in this direction. I've noticed that mine do not have vacuum advance. Is that typical for marine motors? I think I understand what they do and why. It seems to me that having vacuum advance would have some benefit on a marine motor also...
Right now I'm debating between rebuilding the units IO have with a Summit upgrade kit or purchasing new distributors w/vacuum advance. While I've learned a good bit recently, I'd love to gather some opinions from those of you that have been through this...