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 Public Gallery | Home > W Fair > Cars and Transportation > 
1978 to 1981 A/G Body Bellhousings,etc.


This album has been put together in an attempt to illustrate the "CORRECT" OE parts needed to convert a 1978 to 1988 GM A/G Body with an automatic to a manual transmission.

-=I do have a G body specific B.O.P. bell and fork FOR SALE=-

"THANK YOU!" to the people that have granted permission to post their photos.
Album by W Fair. 1 - 71 of 71 Total. 11750 Visits.
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which starter??

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Drawing courtesy of General Motors
linkage

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Drawing courtesy of General Motors
PEDAL

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Drawing courtesy of General Motors
Z BAR

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Drawing courtesy of General Motors
Z Bar Assembly (typical)

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462606
Factory correct Chevrolet A/G Body bellhousing for a 10.5" disc/153 tooth flywheel.

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462606 inside
Notice the position of the clutchfork ballstud hole in it's pad. It is in the lower portion of the pad.

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The unique marker for the A/G Body bellhousings - the last 3 digits of the bell's actual casting# will be cast into the ballstud pad - if it is a 'correct' G body bellhousing. The incorrect bells will have 403 (10.5") or 621 (11") cast here!

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462606
Notice the position of the clutchfork ballstud in it's pad. It is in the lower portion of the pad.

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An example of the unique marker for the A/G Body bellhousings-the pad will show the actual last 3 digits of the casting number, if it's the correct bellhousing.

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An incorrect (for a A/G body) 462606 bellhousing.

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An incorrect (for a A/G body) 462606 bellhousing. Notice the position of the clutchfork ballstud. It's in the upper 1/2 of the pad. This was shipped to me by an eBay seller after assuring me it was the correct bell (his camera was conveniently broke/these are my pictures)- it obviously is not correct and was returned. This is one of the reasons I've created this album.

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464697/469697
The 464697/469697 is probably the  most difficult to find of the A/G Body bellhousings. This is for an 11 inch clutch/168 tooth flywheel. The 10.5" 462606 bells are much more common. If ANYONE knows for a fact-why some of these cars (and which models) were delivered with a 10.5" clutch and others came with an 11" clutch-I would appreciate an email .
I've been told the 11" clutch was only delivered with the 350 engine which was available to the public only in an El Camino/Diablo.


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464697/469697

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464697/469697
This is the unique marker for the A/G Body bellhousings-The pad will show the actual last 3 digits of the casting number, if it's the correct A/G body bellhousing. The other '697' bells will have 621 cast here, as it is a replacement for that bellhousing.

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464697/469697

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464697/469697

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464697/469697

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464697

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Photo courtesy of Darryl M Gilbert
In over 6 years of parts hunting/scrounging, I have only seen two of these 469697 bells. This one, which is in D.M. Gilbert's '78 El Camino, and the other in my son's '78 El Camino.

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Photo courtesy of Darryl M Gilbert
469697. This bell and the 464697 are identical, but for some reason the 469697 is less common than the 464697.

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Photo courtesy of Darryl M Gilbert
469697

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464697
This is a "regular" 464697 bell. Notice the position of the ballstud. The # on this ballstud pad is 621.

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Picture courtesy of Eleanor and Randy Johnson.
BOP bellhousing for an A/G Body.
Casting# 563441.


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Picture courtesy of Eleanor and Randy Johnson.
BOP bellhousing for an A/G Body.
Casting# 563441.


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Photo courtesy of Zach Conn.
The following 7 pictures show B.O.P. A/G Body specific bells. These are new #s to me.
#10008979

I now have two of these bells for sale.


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Photo courtesy of Zach Conn.
#10008979

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Photo courtesy of Zach Conn.
#10008979

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Photo courtesy of Zach Conn.
#10000808

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Photo courtesy of Zach Conn.
#10000808

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Photo courtesy of Zach Conn.
#10000808

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Photo courtesy of Zach Conn.
#10000808

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Looking at the back of the assembly - the clutch pedal is on the right.

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BEFORE   AFTER
Worn linkage hole repaired.


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GM 14007356

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hump

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All 'Factory' Manual Transmission A/G Bodys have a column with a "key release" lever as seen here.

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UNTOUCHED/STOCK '79
View frumunda

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UNTOUCHED/STOCK '79

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UNTOUCHED/STOCK '79

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This is the firewall on my 1983 El Camino.
The upper clutch rod will pass through the hole (1 1/2") that the Cruise Control harness once passed through.
If your car does not have cruise, and this hole has not been punched-there will be a 'dimple' where the hole should be.


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This is the firewall on my 1979 Malibu....no cruise control so there is no hole. Notice the dimples - the dimple pointed to with the white arrow is where the hole for the upper clutch rod needs to be. The two black arrows point to where the holes for the attaching screws for the boot need to be drilled.

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Engine side of firewall.

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Even though this is an '83 (no manual trans available after '81), the 3 holes to mount the Z-Bar frame bracket are present.

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Frame Bracket
Photo courtesy of Marc Hichens. Marc's website, GARAGE-SCENE, contains a wealth of information on converting the GM A/G Bodies to a manual trans.

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An original '78-'81 A/G Body "Upper Clutchrod Firewall Boot".

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64-67
A repro Upper Pushrod Boot for a '64-'67 Chevelle will work.

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68-72
A repro Upper Pushrod Boot for a '68-'72 Chevelle will also work.

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Picture courtesy of Gus Tziavelis.
Part# 14037657. CBOP or corporate bellhousing.
The next few pictures show bellhousings which can also be used in the A/G Bodies.


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Photo courtesy of Darryl M Gilbert
84 to 88 vette - 14048867

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Photo courtesy of Darryl M Gilbert
84 to 88 vette - 14048867

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Photo courtesy of Darryl M Gilbert
84 to 88 vette - 14048867

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Photo courtesy of Darryl M Gilbert
84 to 88 vette - 14048867

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Photo courtesy of Darryl M Gilbert
84 to 88 vette - 14048867.
As the photo shows, the placement of the clutch fork aligns perfectly with the Z Bar and linkage in the A/G Body.


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1
This is usually described as a 'NSS' (No Start Switch) but is actually a safety switch that is actuated by depressing the clutch pedal.

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2

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Drawing is property of CenterForce
Blow-proof

 
   
 
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