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Old 02-04-2003, 12:36 PM
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Post Head Casting #s

I am new to the forum i have a 76 Chevy Monza and pulled the engine last weekend to put in a stall and do some cleaning ,, i bought the car with a 350 in it and was wondering what kind of heads i have ,,, the casting numbers are 3970126 and i found a site that only said 67 to 71 327 / 350 no other details
any help is appreciated
Thanks Dan

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Old 02-04-2003, 12:52 PM
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I really don't know much about this specific casting but they should have 1.94"in. and 1.5"ex. valves. Don't know about c.c. Performance head?
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Old 02-04-2003, 01:29 PM
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Dan,3 sources I have :mortec 67-70 327/350; chevy v-8 casting # book 69-72 350 camaro,nova,cheville,big plugs69-70,smallplugs71-72,also says 350 truck 69-74 big plug 69-70,small plug71-74; chevy small block interchange manual;69-70 base 350 1.71intake 1.50exhaust maybe help alittle
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Old 02-04-2003, 07:27 PM
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Thanks for the help , i talked to a friend at school tonight and he has a set of 327 heads off a 325 hrs motor he wants $200 for new valve springs ,, guides and all ,,, he said they have the 1,60 exhaust valves i do not remember the intakes right off hand , is this a good price ??
he said bolt on around 75 hrs ,, i am not sure about the horse thing any help ??

Later Dan
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Old 02-05-2003, 01:37 AM
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Dan I'd do alittle more shopping the 327 heads don't have harden valve seats,also I don't think they have accessary hole in the front of them either.
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Old 02-05-2003, 03:47 AM
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Dan, here is a good site to information on any sbc casting:
www.nastyz28.com/sbcmenu.html
I think you will enjoy it I did
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Old 02-05-2003, 07:37 PM
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thanks for the advice , i was realy thinking about buying these but you all dont think they are all they are said to be i assume ,,, zonk what accessory hole do you mean ,, i cant bolt up my power steering or alternator ??? not sure

Thanks Dan
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Old 02-05-2003, 08:15 PM
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If there 2.02/1.60 double hump heads grab um at $200 my oppinion anyway.As long as there in good shape (no sunkin valves,cracks,hacking etc...)
I love the old Monzas my uncle had two a 77 with a old stock 350 and a top loader 5speed nice steet car.
Then he had the little screamer.A 1980 monza with a high comnpression 331 with 2.02/1.60 double humps and stalled stock converter 9" slicks and 4.56s. Would pull a 6.35sec 1/8th.
With the torque arm you've got traction out the *** evan on narrow slicks.
Through a 3.73 gear in get a posi(or weld the spiders shhh)put those double humps on with a properly selected cam and some headers and a stall converter.And I'll bet 12sec ET slips would be cake.
Monte
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Old 02-06-2003, 04:16 AM
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could someone tell me this why do some people say that you have to get the hardened seats for the double hump heads. most of them have been refurbished years ago when they change fuel. me personaly have never say a set that need the hardened seats(exept on the internet) but they have been sitting in the garage for 20 years just my 2cents
denny
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Old 02-06-2003, 05:06 AM
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I dunno about the seats being changed already on most of them,but either way I don't think the unleaded gas will eat um till the motors up there in miles like 70,000 anyway.
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Old 02-06-2003, 01:17 PM
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on the end of the heads there are 3 holes for mounting alternator,a/c if your accessories mountsare of a new motor you need these
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Old 02-06-2003, 07:47 PM
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Holy Moly at all the replies ,, are you saying these are double hump heads and if so how can i tell by looking at them ???
MY car is a 76 2+2 with a 350 only for the street about 300 hrs for now ,, BTW can you post pics in your messages here , i have lots ,,, i just figured out how to link to them if so i will show everyone some pics just give me some insight how do you enable html ?? i will mess with it for a minute ..
Later Dan
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Old 02-06-2003, 07:55 PM
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[img]ftp://voodoo_perf:v00d00vega@ftp.v8monza.com/v8monza.com/voodoo_perf/Dads%20truck/My%20monza%202%20web.jpg[/img]
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Old 02-06-2003, 07:56 PM
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Cool it does work here ,,
Dan
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Old 02-06-2003, 09:08 PM
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Warmstrong,
3970126 heads are also 1967-79 327/350cid 75cc chambers 1.72/1.5 valve 148.3 cc intake
87.9 ex flow. Hope this helped ya.

[ February 06, 2003: Message edited by: eight90 ]</p>
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