Hey Ted;  Thanks for the info, think I'll Start with your suggestions.   God Bless   Eddie

Eddie

Lake Forest, Ca. 92630

Hey Joey;;   Many thanks, really hope to run the vac advance.    THANK YOU    God Bless    Eddie

Eddie

Lake Forest, Ca. 92630

My 312 has the stock 9425B intake, ported and polished C heads, and a mild cam. I went with a mechanical advance dual point dizzy. My spring colors are different (Mallory) but the bottom line is that mine also preferred a lot of advance early.

With the Holley carb, a blue and light silver spring combination with the silver bushing would be a good starting point.  If you had a Demon carb, then a blue bushing with the two light blue springs would more applicable.  The amount of vacuum advance being pulled in is also a player which can dictate a different curve combination.  My EMC engine on the other hand liked a short and lazy curve meaning lots of initial but final timing not being in until after 3750 rpms which was a black bushing with the two heavy silver springs but there's no vacuum advance being employed on that engine.

Lorena, Texas (South of Waco)

Hey Fairlane;;   Many thanks, what about a silver and a blue??  what bushing did you use??  Again Thank You  God Bless   Eddie

Eddie

Lake Forest, Ca. 92630

I tried silver springs and was not impressed,went back to blue springs and liked the better response and overall performance.Just my opinion.Jim

HI Ted;;   Thanks for responce;;    Blue Thunder Man.---  Holley double pumper, modified by Ted Fleetwood,,   (NASCAR  carb builder)  650 cfm.  Carb made  a great difference!!  Ted, also have Sanderson Headers, Engle Cam, John"s modified G heads.  Kinda thinking-- blue bushing-- with small silver springs.   Again  Many Thanks, not for just my questions, but for everyday help, to everyone. really appreciate the sharing on this site.  God Bless All    Eddie

Eddie

Lake Forest, Ca. 92630

What intake and carb?  This will make a difference on the distributor advance curve setup.

Lorena, Texas (South of Waco)

Putting MSD Dist. in our Bird. Any suggestionns for Advance springs and advance stop bushing.  Thanks in advance.   God Bless    Eddie

Eddie

Lake Forest, Ca. 92630