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#1
11-29-2018, 11:36 AM
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Stamped 46 Heads
Doing a basic garage cleanout and I've come across a set of heads stamped 46 from a 1968 Catalina 428. A few friends told me, without any specifics, that these heads are desirable ones to use in a buildout of a 400 or larger block. I know nothing about these, so I'd like to know if anyone on here knows if these are worth keeping, or would they just serve as boat anchors?
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Save yo Confederate money, boys, the South is gonna do it again! Pecosbill |
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#2
11-29-2018, 11:46 AM
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 A friend has these on his '65. We were thinking about swapping them out for a set of 670's he has. This thread may or may not change our mind. |
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#3
11-29-2018, 11:50 AM
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They are 10 to 1 CR, but small valve.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#4
11-29-2018, 11:59 AM
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Were they used on '68 or perhaps '69 GTO's? Perhaps on 2bbl GTO models?
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#5
11-29-2018, 12:42 PM
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They were 1969 heads.
Then they made some in 73/74 also. (still small valve but lower cr) May have to check the date on them to be sure? None were used on GTO's, mostly big car heads in 69.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#6
11-29-2018, 01:00 PM
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Looks like the 670's are going to go to good use. Thanks
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#7
11-29-2018, 01:42 PM
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Actually Johntal, you are probably correct; it may have been a 1969 Catalina. The guy I got them from many moons ago threw them in when I bought a car from him. It had the 428 motor in it with stamped 64 H.O. heads on it from a 455. The motor was in a 1964 goat and with the cam, forged pistons, MSD ignition, etc. it ran like a scalded dog.
Even though they are small valved, with the 10:1 compression would it be worth it to redo the heads with larger valves? I have no idea as to what all is involved, but I'll bet someone on this board does.
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Save yo Confederate money, boys, the South is gonna do it again! Pecosbill |
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#8
11-29-2018, 02:00 PM
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I'm sure steve25 would know.
Probably not hard to put bigger valves in it. Possibly just 2.11" intake may be enough.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#9
11-29-2018, 09:15 PM
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Used on '69 400 and 428 engines, not used on the GTO.
Outer exhaust bolt holes are not drilled and tapped, press-in studs, 45-degree intake and exhaust valve seats. Very nice head to upgrade to big valves/screw-in studs. Really excellent 350 head choice.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#10
12-04-2018, 11:48 AM
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Thanks, b-man. Maybe I'll hang on to these boys for the day that I decide to build out another poncho block or hand them off to someone who will.
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Save yo Confederate money, boys, the South is gonna do it again! Pecosbill |
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#11
12-15-2019, 07:04 PM
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Okay, I've held onto them long enough. Part of me would like to play around with them, but as old as I'm getting I decided to get in the parts disposal business, as my kids will have no idea of the value of some of my extra parts if I should croak. They would probably just toss things that I know to be good, desirable, rare or just plain interesting. I'll post them over in the For Sale section.
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Save yo Confederate money, boys, the South is gonna do it again! Pecosbill |
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