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Would anyone know what the fitting next to the distributor on the intake is for?it’s not the oil sender unit that’s on the side of the block This has a wire harness connector on it. Would appreciate it. Thanks John
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Joined: May 2007
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15+ Year Member
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SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.
2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes, and Jmod.
Never argue with an idiot.
They will just drag you down to their level and beat you with experience.
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Joined: May 2014
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1988 SS 5.0
Last edited by Ubowl; 01/03/22 10:38 PM.
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Joined: May 2007
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Likely its the external ignition coil. 87 and 88 don't use coil in cap HEI.
SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.
2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes, and Jmod.
Never argue with an idiot.
They will just drag you down to their level and beat you with experience.
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Joined: Dec 1999
Posts: 12,117 Likes: 5
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It's for coolant to circulate out of the rear of the head and into the heater hose to make sure that their are no air pockets. Is there a small hose connected to it or is it capped??
Leo Paugh It's not an attitude, it's just the way I am. POW*MIA You are not forgotten If things improve with age, I must be approaching magnificent. 
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Joined: Jun 2003
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20+ Year Member
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Oil pressure switch for the choke???
1985 GMC Caballero 4.3L V6 TBI 200C w/ 2.41 posi
86 Monte Carlo SS BBC396 M20 w/ 3.42 posi screen name whip rust i.p.
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There’s no hose nor place to attach one to
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Joined: May 2014
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The coil was bolted to the manifold. I changed the distributor to HEI type it had nothing to do with this item I’m referencing.
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Joined: Feb 2020
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I think it is for the coolant dash gauge
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The only thing that I can think of in that area with a electrical connector on it and not associated with the distributor is the oil pressure switch. On Monte SS, it shares a circuit with the choke coil. Before I did my TPI conversion I had to determine what that circuit was for and if I needed it for TPI. The oil pressure switch there on the Monte prevents the electric choke from heating up with the key on-engine off. That way the electric choke only heats up when the engine is running.
87 SS, UMI trailing arms. Hooker 2050 Jet Hot Coated Headers. Hooker Cat-Back Exhaust, 350, Ported TPI, Trick Flow 56cc alum heads, SLP runners, Comp Cams 260AH-12, Trick Flow roller rockers, TCI 2400 stall converter, Denny's 3.5" Driveshaft, GBodyParts GNX Replica Rims 18x8 &18x9, F-Body Serpentine Belt Sys with Sanden A/C compressor mod.
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