I had to pull the dizzy on my '74 BGT with HIF4's because the vaccum advance
was leaking. I got a 41147 to put in there. This number does not match
with ones on paul's chart at
http://www.teglerizer.com/mgstuff/advance_curves.htm
any ideas what a 41147 was from, would it work with a manifold vaccum
source???
I've also got a 41339 in the shop that may have a good vaccum advance unit
on it. It is listed as appropriate for a '71 low compression and manifold
vaccum source which is what I have with the HIF4's.
Bill Mills
Raleigh, NC
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