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HQ 350 - Help to identify correct part numbers
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detective Offline
#81 Posted : Sunday, 30 September 2018 3:30:41 PM(UTC)
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Originally Posted by: Allaboutthenumbers Go to Quoted Post
So trying to make a list of the rare HQ 350 specific stuff I need to look out for, I'm missing tailshaft back, including motor. Just the Aus stuff not the correct part number replacement stuff that I can get from the states. I have an 11QU block.
So off the top of my head...

*Console hump (can cut it into repo console)
*Radiator?
*Tailshaft(debatable)
*clutch linkages
*shifter stick
*gear knob
*accelerator linkages?
*carby correct part number

Anything else Aus specific?


...You'll search till hell freezes over ever attempting to gather up the myriad items that make up the "clutch linkages". An absolutely complex array of special bracketry and bits, from RH firewall to left rear of engine via a shouldered cross shaft, with the special clutch pedal/pivot levers transmitting it all down to the clutch fork...You're facing an horrendous exercise, but best of luck and good hunting.

...also, the accelerator linkages are standard items to any V8 HQ. The linkage from the firewall pivot to the carby might be the only foreign item.

Edited by user Sunday, 30 September 2018 3:50:29 PM(UTC)  | Reason: Not specified
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Allaboutthenumbers on 30/09/2018(UTC)
detective Offline
#82 Posted : Sunday, 30 September 2018 3:39:18 PM(UTC)
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Originally Posted by: Allaboutthenumbers Go to Quoted Post
Wondering, was there a later batch of motors from McKinnon plant used in the HQ. With K on the block, say about 1973?


...The engine number in my 8/71 GTS350 coupe is QU40113 KO303H if that's any help.(funny how I've never forgotten that engine number ! lol)

Edited by user Sunday, 30 September 2018 3:46:21 PM(UTC)  | Reason: Not specified
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detective Offline
#83 Posted : Sunday, 30 September 2018 3:44:37 PM(UTC)
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Originally Posted by: LS350 Go to Quoted Post


First photo is the original starter on our 6/71 ls 350 it's build date is July 23 1970 .(delco remy)

Second photo starter fitted,had on going issues with starter motor when hot,starter would not work no solenoid clip nothing.

Installed a temp heat shield cloth around the solenoid only and it appear's to have rectified it starts now when hot.

Next job is to remove starter and instal shield neatly around solenoid.


...had the exact same problem when used daily, but taken on a long trip in hot weather...used to have to reach under the car with a wet rag to cool the starter down, but jeeez, that was nearly 40 years ago !!
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detective Offline
#84 Posted : Sunday, 30 September 2018 4:01:48 PM(UTC)
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Originally Posted by: Allaboutthenumbers Go to Quoted Post
I thought the hump was welded to the tunnel, didn't realise it was screwed down.


...pretty sure about that, but other people will know. ??
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detective Offline
#85 Posted : Sunday, 30 September 2018 4:06:39 PM(UTC)
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Originally Posted by: LS350 Go to Quoted Post

some Muncie photo's that may help you


There you go Dr Terry .. photo 2 showing seat belt stalks with the old buckle pockets.

Edited by user Sunday, 30 September 2018 4:08:45 PM(UTC)  | Reason: Not specified
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HK1837 Offline
#86 Posted : Sunday, 30 September 2018 5:02:34 PM(UTC)
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Originally Posted by: detective Go to Quoted Post
Originally Posted by: HK1837 Go to Quoted Post
All Muncies at the time the HQ boxes were built should be the big input and output shaft type. It was an upgrade for from memory the 1970 or 1971 model year.

Rockcrusher is an M22 Muncie and they can be found in both early and late types. HQ box is an M20 Muncie. There is nothing special about HQ Muncie box, but they are instantly indentifiable by certain people.


...always thought the Rockcrusher was 31 spline and a "standard" Muncie was 28.


No. Rockcrusher name is from the noise the straighter cut gears make on the M22.

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Allaboutthenumbers Offline
#87 Posted : Sunday, 30 September 2018 5:48:08 PM(UTC)
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Originally Posted by: detective Go to Quoted Post
Originally Posted by: Allaboutthenumbers Go to Quoted Post
Wondering, was there a later batch of motors from McKinnon plant used in the HQ. With K on the block, say about 1973?


...The engine number in my 8/71 GTS350 coupe is QU40113 KO303H if that's any help.(funny how I've never forgotten that engine number ! lol)


Cool thanks, so a Melbourne motor, I roughly know what mine should be.
As for the previous post, I luckily have a complete reproduction clutch linkage set up from pedal to fork. I have a V8 accelerator linkage set up but I don't have the angle that the firewall bracket is bent to.

If anyone has one that can get the correct angle for me, that would be awesome
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detective Offline
#88 Posted : Sunday, 30 September 2018 6:19:20 PM(UTC)
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Would you mind posting up a few pics of the repro bracketry etc. ?
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Allaboutthenumbers Offline
#89 Posted : Sunday, 30 September 2018 6:56:29 PM(UTC)
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If I could work out how to I would
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justgm Offline
#90 Posted : Monday, 1 October 2018 6:14:51 AM(UTC)
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I could send some pics and measurements of the 350 firewall bracket if you have an e-mail address ? I cannot work out how to post pics here . Thanks Mark.
life is good in "Wine & Holden Marlborough "
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LS350 Offline
#91 Posted : Monday, 1 October 2018 12:04:47 PM(UTC)
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Originally Posted by: Allaboutthenumbers Go to Quoted Post
Originally Posted by: LS350 Go to Quoted Post


First photo is the original starter on our 6/71 ls 350 it's build date is July 23 1970 .(delco remy)

Second photo starter fitted,had on going issues with starter motor when hot,starter would not work no solenoid clip nothing.

Installed a temp heat shield cloth around the solenoid only and it appear's to have rectified it starts now when hot.

Next job is to remove starter and instal shield neatly around solenoid.


Don't have original Alternator still on your motor do you....or know correct part number?


I have the original alternator's(Lucas) on both car's A/C.

You will need a bosch alternator no A/C plus bosch regulator.

Plus the larger dia pulley and fan are 350 only. (see tables)
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