I'm just wondering what mods were allowed under race rules for Ht gts 350's that raced at Bathurst?
Or as production class cars were they raced in the form as any restored car would be to-day?

I remember reading that one driver wasn't allowed to bend the accelerator pedal to get a better heel & toe action.

They were really pedantic in the 'olden days'

They did modify HT not long after release to move the upper control arm mounting points. Earlier ones were the same as HK. Maybe they were allowed to emulate this?

I assume they lowered the upper control arm for more neg camber?

From what I am led to believe is that with the GT-HO Phase 2 and P3 is that both cams are 40/80 300 duration the P2 is the higher lift and the P3 is lower one and the Bathurst race cars could run a higher lift cam than both of them but it is still a 40/80 300 duration cam as some did or did not use this higher lift cam in racing.

As for the HT GTS Monaro they used a P/N 186 head for Bathurst but you could never get a 186 head if you bought it from the factory and if you wanted the 186 you had to fork out for it and get it fitted as it was a dealer fitted option as well as a bigger cam.

In AMC issue 46 page 40 we see in the addendum we see a 603 head cancelled.
What is this head and why was it cancelled, was there going to be a higher spec engine ?
The race HT was only rev to 4500 at Bathurst bar down the straight, so the bigger cam and heads were not needed as a formula in that year as tyres brakes and so on would of been all worked out.

I am of interested to know what the so called Bathurst cam was that you could of got with the 186 head package. they must of used this cam for Bathurst I would think it a little bit bigger then the std one.

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Originally posted by castellan
From what I am led to believe is that with the GT-HO Phase 2 and P3 is that both cams are 40/80 300 duration the P2 is the higher lift and the P3 is lower one and the Bathurst race cars could run a higher lift cam than both of them but it is still a 40/80 300 duration cam as some did or did not use this higher lift cam in racing.

As for the HT GTS Monaro they used a P/N 186 head for Bathurst but you could never get a 186 head if you bought it from the factory and if you wanted the 186 you had to fork out for it and get it fitted as it was a dealer fitted option as well as a bigger cam.

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no matter what head or whatever negative rubbish on the top arm, even 10 of the above mentioned HT GTS 350 coupes don't even come anywhere near one GTHO, even if the HO had 2 plug leads off.
take a ride in one, you will not even look at a 81837 car again

Really? 81837 was designed to win Bathurst, I thought. Ran in 1968 and won it, ran in 1969 and won it. I'd say it was a successful design. The GTHO arrived 18 months later and cost 40% more, so you'd kind of hope it was a bit better, wouldn't you?

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Originally posted by castellan

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Originally posted by HK1837
There is anothe rcamshaft, I think the specs are in Fiv's book.

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Fiv book I have is only to do with the GTR XU-1. and the last Bathurst special cam in 1973 is the same one as the 1972.

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I think there is another cam, will see if I can find it.

What I am after is the so called HT GTS 350 Bathurst cam option, what it was.
From what we are led to believe the HT GTS 350 Monaro is one thing and the so called Bathurst HT Monaro ? this car has the 186 heads a bit bigger cam air cleaner mods, diff ratios and a 12 bolt diff. now this is not your std 350 Monaro your Joh average bought.
Now as I take it Joe average got the option after he bought the car new to go the engine options through a Holden dealer.