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did these ever come out on HT HG monaro?
i just picked up a 3970020 motor with a pair of fuellies today, not date matching, but both 462's |
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No. HT and HG had heads with accessory holes in them. The 5 x types of 462's are earlier style heads without the holes: 3767462, 3782462, 3814462, 3890462 and 3891462. Although the second last number was used on 1968 327 and 350 so these could have accessory holes, but not used on HT or HG as far as I know. That second last number head came with 202/1.6 valves in some applications like 1968 Z28, but I doubt the heads you have are this type or even 1.94 valve heads as they were on a 307 (3970020) and it is only 1969-1973 so doesn't really overlap in timeframe with the usage of 462 heads. |
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You left one out Byron.
One other is the 3981462 Heads which were fitted to 302 Z/28 Camaro in 1967. Valve sizes were 1.94 and 1.5
These are very rare heads to find.
This engine was rated at 370hp with these heads. Outstanding performance for an engine this size from the factory with no mods.
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3891462, last one I listed. I think they had 2.02" inlets in 1967 302 though, 1.94" were on 327 and 350. |
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3981462 not 3891462 as you state. Yes 3891462 were 2.02 Inlets
The 302 cu" I'm referring to was as you probably know is a 283 block with steel crank, large journals and 4 bolt mains. I remember reading somewhere that only 50 or so were produced and they should have been emblemed SS - but a shortage of emblems left GM only to badge them as Z/28's
I would say these Camaros were about as rare as Yenko's
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I've never heard of 3981462. I only have 3890462, 3891462 and 3917264 listed against the 1967 small journal 302 and all stste 2.20" inlets.
The later Z28 302's list 3912291, 3917291, 3927186, 3927187, 3931639, 3947040 and 3947041.
All 302 heads are listed as 64cc with 2.02" inlets. Info could be wrong though. |
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Try here, http://www.nastyz28.com/sbchevy/sbch.php
1967 3981462 302 1.94 1.5 Last third of the page down
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I don't think that is right, I'm pretty sure 3891462 is the number. |
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Well who am I to argue,
A simple Google search will bring up hundreds of sites that show the Head number to be in existance with the same 302 cu" capacity that the Heads were fitted to, same valve sizes 1.94 1.5
Most sites refer to these Motor/Head combination belonging to Z/28 Camaro. I'll try to find a site that makes mention of this Motor/Head and the non SS Camaro Emblems - so Z/28 substitute emblems were fitted to these vehicles by GM, and the very impressive power rating.
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They were very high power engines, designed to race in Transam series. I have a feeling that like many things on the 'web, someone has made a typo somewhere and it has been copied as you see the head in question quoted as both 3891462 and 3981462 so one of them must be wrong! I always thought the 302 was 1967-1969 Z/28 only, SJ in 1967 using a 327 SJ block with 283 crank, LJ in 1968-69 with a unique crankshaft. These all has 2.02" va;ves, but if the engine was used somewhere outside of Z/28 then that may explain the 1.94" valve usage (these heads were used on 327 and 350 too with 1.94" valves). 302 was built to be under the 5-litre limit for Tranam racing. In 1970 the rules were changed to allow the engine to be modified (de-stroked) so the 1970 Z/28 had a 360hp 350 LT1 engine. |
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quote:
Originally posted by HK1837
They were very high power engines, designed to race in Transam series. I have a feeling that like many things on the 'web, someone has made a typo somewhere and it has been copied as you see the head in question quoted as both 3891462 and 3981462 so one of them must be wrong! I always thought the 302 was 1967-1969 Z/28 only, SJ in 1967 using a 327 SJ block with 283 crank, LJ in 1968-69 with a unique crankshaft. These all has 2.02" va;ves, but if the engine was used somewhere outside of Z/28 then that may explain the 1.94" valve usage (these heads were used on 327 and 350 too with 1.94" valves). 302 was built to be under the 5-litre limit for Tranam racing. In 1970 the rules were changed to allow the engine to be modified (de-stroked) so the 1970 Z/28 had a 360hp 350 LT1 engine.
correct byron. & was going to be used in th HG GTS 350, but never eventuated. how awesome would that have been??
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Yes, the HG GTS350 especially the later engine was awesome, but it was still a cast iron intake, hydraulic lifter engine rated around 300hp and basically matched a Phase III in acceleration and 1/4 mile times. Imagine the 360hp, alloy intake, solid lifter LT1 engine in a Monaro! It'd have to have had a Muncie and 12-bolt fitted to handle the engine, and this would have been the car to own today! |
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