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Distributor Vacuum Control Valve

Started by 69 GT350 Vert, May 04, 2025, 01:08:24 PM

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69 GT350 Vert

My 1969 shop manual shows for a 351W without AC, there is not a distributor vacuum control valve in the waterneck.  Is that correct?  I thought all cars had one. 

It looks like the distributor vacuum advance in my 69 GT350 was designed to receive full manifold vacuum.  Not ported/timed vacuum.

Bob Gaines

Quote from: 69 GT350 Vert on May 04, 2025, 01:08:24 PMMy 1969 shop manual shows for a 351W without AC, there is not a distributor vacuum control valve in the waterneck.  Is that correct?  I thought all cars had one. 

It looks like the distributor vacuum advance in my 69 GT350 was designed to receive full manifold vacuum.  Not ported/timed vacuum.
The thermostat housing has the opening for the vacuum switch but it has a plug put in it from the engine plant.
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby

Coralsnake

Check out theCoralsnake.com

I'm looking for 9F02M480004. Have you seen it?

69 GT350 Vert

Automatic. Early car #100 built in December 1968. 

Coralsnake

#4
I think it should have vacuum port.

See bottom of page


http://www.thecoralsnake.com/K211S.html

No ac no tree, ac gets tree, 1970s were updated





Check out theCoralsnake.com

I'm looking for 9F02M480004. Have you seen it?

Royce Peterson

Quote from: Coralsnake on May 04, 2025, 01:52:57 PMI think it should have vacuum port.

See bottom of page


http://www.thecoralsnake.com/K211S.html

No ac no tree, ac gets tree, 1970s were updated


He has a 1969 GT350 without AC - I think his car has a plug in the water neck and no vacuum control valve.
1968 Cougar XR-7 GT-E 427 Side Oiler C6 3.50 Detroit Locker
1968 1/2 Cougar XR-7 428CJ Ram Air C6 3.91 Traction Lock

shelbymann1970

Bob, it should have a square plug. No vacuum tree.
Shelby owner since 1984
SAAC member since 1990
1970 GT350 4 speed(owned since 1985).
  MCA gold 2003(not anymore)
1969 Mach1 428SCJ 4 speed R-code (owned since 2013)
"2nd" owner of 68 GT500 #1626

Coralsnake

My mistake no AC no port in 1969 for his application
Check out theCoralsnake.com

I'm looking for 9F02M480004. Have you seen it?

69 GT350 Vert

Thanks guys.  I will have to find the correct size square plug.  I have an allen head plug in there now and it bugs me.