70 440 six pack 4sp distributor vacuum advance ????

I see two part numbers listed for the distributor! One early , one late.

I'm trying to figure out if i need the regular vacuum advance or the electronic vacuum advance?

Car was sced for build Feb 14 of '70

Don't have the numbers (??19, maybe?) but my old '70 rr dist. was plain old vacuum can/dual point. Build date date was 07/24/70, LA car.

old dist pic

my car was built 6/13/70 and has a regular advance can with DP distributor.
nothing electronic.

maybe smog related engines got that.
or it had to do with engine options and configurations... ???

don't know....

bill

Anyone else !! This is very helpfull!!

My Superbird,Prestolite dual point.# 3439314 dated 41 9

I believe you will find that the "electrical" assisted vacuum advance was introduced sometime around January 1970 and was related to the N95 option code (california emissions)

Mine was n95, no electrics.

I recall it was not an assist, but rather a retard for the timing at idle. Check your FSM. AVS carbs had a ground at the idle screw. 6 Packs did not.

Defiantly the later type vacuum advance. I believe PN 3420919. I believe the arm should have 11 stamped on it.