I have installed one on my boat 4 cyl. Merc. which is a Chevy II engine and it has made a world of diference when going slow trolling the engine does not load up like regular points did. You get a complete better burn of fuel with the hotter spark and smoother running on your the top end. I would highly recommend this conversion.
62Blue
Don


62Blue
62Chevy in progress
You've never been lost until you've been lost at Mach3" Paul F Crichmore (Test Pilot)