I want to convert to electronic ignition (sbc), and I've been looking at Pertronix, Delco EST, and DUI. All claim to be compatible with OMC shift assist. I just wonder what the differences, advantages/ disadvantages are.
Seems that DUI is a mechanical advance unit, Delco EST is electronically advanced by module, and not sure about Pertronix. I'm looking for about 32 deg total advance. Any opinions?

Go DUI, they will customize the advanced curve for you. I have had great success with this system in a number of my friends boats that I work on.

I spoke to Scott over there. I like the idea that they set up the curve for you. I've always had good results with distributors that have been custom curved. I also like the idea that if you puke a module, you can stick a standard GM replacement in, and salvage your weekend. I've been leaning towards the DUI system.

I had DUI on my last boat; stab it, time it, and leave it alone. My new boat's got twins and I'm saving my nickels for more DUI's.

I purchased mine over a year ago and have been thrilled with mine...And as you stated you can go to any auto parts store and get replacement parts! As far as I am concerned Crane,MSD,Mercruiser etc are all second fiddle to D.U.I.....

BH

Over 12 years on my DUIs, never a problem. They may cost more initially, but then I added up the cost of a Tbolt sensor and a couple modules replaced on other boats. The DUI is well worth it.
Gary

I have DUI's in all my boats, I just finished my Jet Boat. It has the 350 Vortec. I called Performance Dist. to send me one with a set of the perfect live wires!

Looks like I'm going DUI!