WIW Double hump heads - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**6t727t2** · 02-10-2009, 09:55 AM

No history on these, removed from a '70 parts blazer, casting# 3917291 & 3890462, does $300 pr sound fair? Too heavy to ship, but could deliver to spring Carlisle PA swap meet.

72Levi · 02-10-2009, 10:10 AM

I don't think Blazers ever had double hump, 2.02 heads did they? I thought they were only on Corvettes, Camaros, Chevelles? $250-$300 sounds about right for the original folks.

**rockc** · 02-10-2009, 10:46 AM

I found a 327 with the double humps in a 69 pickup that i bought. As far as I can tell the motor and power glide tranny was original.

jsbgump · 02-10-2009, 11:43 AM

250-300 should be goin rate

**6t727t2** · 02-10-2009, 11:53 AM

This was definitely not the original blazer engine, just installed in it.
More pics.

69Rob · 02-10-2009, 03:08 PM

i got a complete 327 with a powerglide out of a old caprice cop car came with dbl hump heads

bestchevyfan · 02-10-2009, 03:17 PM

Hey, what is the date code on them ? Thanks,buddy

jsbgump · 02-10-2009, 05:23 PM

3890462....66-67...302/327/350..Camel hump,no accessory holes,64cc chamber

jsbgump · 02-10-2009, 05:24 PM

3917291....67-68...302/327/350..Camel hump,no accessory holes,64cc chamber

jsbgump · 02-10-2009, 05:24 PM

Those notes are from Mortec

fixit-p · 02-10-2009, 06:00 PM

The one has a date code of B227 which is Feb. 22, 1967 also someone has gone though these orig. these heads came with press in rocker studs yours are screw in w/ push rod guides and the springs aren't stock either I bet they've been ported as well I have a stock set of 462's and the machine work alone runs $500 most people now days are going with vortec's but if someone were restoring a camaro or corvette and wanted to keep the numbers they would be worth quite a bit that's mho

blazin27 · 02-10-2009, 07:30 PM

what makes these double hump heads Im curious

**too much stuff** · 02-10-2009, 07:37 PM

Quote:

Originally Posted by blazin27

what makes these double hump heads Im curious

Look at the casting on the end of the head. There are a couple good pics of it.

BurnoutNova · 02-10-2009, 08:45 PM

Quote:

Originally Posted by fixit-p

The one has a date code of B227 which is Feb. 22, 1967 also someone has gone though these orig. these heads came with press in rocker studs yours are screw in w/ push rod guides and the springs aren't stock either I bet they've been ported as well

they did come with screw in studes if they were factory equipped with guideplates. I have some 461's with factory screw in studs and guideplates, and my 291's from my 302 have factory guideplates as well.

*67/72junkie* · 02-10-2009, 09:37 PM

this is a mismatched set of heads,ie both heads should be 461 or 291 to be a matched set and should have very close casting dates.461 with 1.94 and 1.5 valves came on 275 and 300 hp 327 and some 67-69 350 .some came with 202 and 1.6 valves 3/8s studs and guide plates on 325 ,350,360 and 370hp engines 461x are corvette 370hp and have larger volume runners 291 also came in several combinations all 67 and 68 302 z28s had 291 with the lager valves and studs and guide plates 69 and 70 z28s carry 186 casting #s

blazin27 · 02-11-2009, 11:46 AM

thanks I will have to check my heads to see if they are double hump I was told the were expensive but I am just learning about my engine and how to work on it so any info is helpful. plus I am learning to weld so I can fix my blazer

02-10-2009, 09:55 AM	#1
6t727t2 Active Member Join Date: Dec 2004 Location: NJ Posts: 6,438	WIW Double hump heads No history on these, removed from a '70 parts blazer, casting# 3917291 & 3890462, does $300 pr sound fair? Too heavy to ship, but could deliver to spring Carlisle PA swap meet. Attached Images

02-10-2009, 10:10 AM	#2
72Levi Active Member Join Date: Feb 2006 Location: sa tx Posts: 851	Re: WIW Double hump heads I don't think Blazers ever had double hump, 2.02 heads did they? I thought they were only on Corvettes, Camaros, Chevelles? $250-$300 sounds about right for the original folks. __________________ 1972 K5 Blazer ALL ORIGINAL paint & engine, A/C, Tilt, 4sp, AM/FM, Tow Hooks, Aux Battery Tray, Tach, Vacuum 2004 FORD FX4 SuperCrew 2005 CTS-V 12 sec family car 2008 Buick Enclave AWD, Nav, & DVD, Wife LOVES it!

02-10-2009, 10:46 AM	#3
rockc Registered User Join Date: Jul 2007 Location: SE WY Posts: 633	Re: WIW Double hump heads I found a 327 with the double humps in a 69 pickup that i bought. As far as I can tell the motor and power glide tranny was original.

02-10-2009, 11:43 AM	#4
jsbgump Gone Fishing Join Date: Aug 2005 Location: Fort Worth, Texas 76135 Posts: 12,361	Re: WIW Double hump heads 250-300 should be goin rate __________________ 68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616

02-10-2009, 11:53 AM	#5
6t727t2 Active Member Join Date: Dec 2004 Location: NJ Posts: 6,438	Re: WIW Double hump heads This was definitely not the original blazer engine, just installed in it. More pics. Attached Images

02-10-2009, 03:08 PM	#6
69Rob Registered User Join Date: Oct 2008 Location: Houston, Tx Posts: 182	Re: WIW Double hump heads i got a complete 327 with a powerglide out of a old caprice cop car came with dbl hump heads __________________ 2009 dodge hemi custom paint 86 lwb bagged layin frame 73 2 door nova 54 bel air

02-10-2009, 03:17 PM	#7
bestchevyfan Registered User Join Date: Jun 2002 Location: new market, alabama Posts: 1,330	Re: WIW Double hump heads Hey, what is the date code on them ? Thanks,buddy

02-10-2009, 05:23 PM	#8
jsbgump Gone Fishing Join Date: Aug 2005 Location: Fort Worth, Texas 76135 Posts: 12,361	Re: WIW Double hump heads 3890462....66-67...302/327/350..Camel hump,no accessory holes,64cc chamber __________________ 68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616

02-10-2009, 05:24 PM	#9
jsbgump Gone Fishing Join Date: Aug 2005 Location: Fort Worth, Texas 76135 Posts: 12,361	Re: WIW Double hump heads 3917291....67-68...302/327/350..Camel hump,no accessory holes,64cc chamber __________________ 68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616

02-10-2009, 05:24 PM	#10
jsbgump Gone Fishing Join Date: Aug 2005 Location: Fort Worth, Texas 76135 Posts: 12,361	Re: WIW Double hump heads Those notes are from Mortec __________________ 68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616

02-10-2009, 06:00 PM	#11
fixit-p Registered User Join Date: Dec 2008 Location: Yay Area CA Posts: 2,329	Re: WIW Double hump heads The one has a date code of B227 which is Feb. 22, 1967 also someone has gone though these orig. these heads came with press in rocker studs yours are screw in w/ push rod guides and the springs aren't stock either I bet they've been ported as well I have a stock set of 462's and the machine work alone runs $500 most people now days are going with vortec's but if someone were restoring a camaro or corvette and wanted to keep the numbers they would be worth quite a bit that's mho

02-10-2009, 07:30 PM	#12
blazin27 Registered User Join Date: Sep 2008 Location: Weed,ca Posts: 2	Re: WIW Double hump heads what makes these double hump heads Im curious

02-10-2009, 09:37 PM	#15
67/72junkie Account Suspended Join Date: Oct 2002 Location: NC Posts: 1,129	Re: WIW Double hump heads this is a mismatched set of heads,ie both heads should be 461 or 291 to be a matched set and should have very close casting dates.461 with 1.94 and 1.5 valves came on 275 and 300 hp 327 and some 67-69 350 .some came with 202 and 1.6 valves 3/8s studs and guide plates on 325 ,350,360 and 370hp engines 461x are corvette 370hp and have larger volume runners 291 also came in several combinations all 67 and 68 302 z28s had 291 with the lager valves and studs and guide plates 69 and 70 z28s carry 186 casting #s

02-11-2009, 11:46 AM	#16
blazin27 Registered User Join Date: Sep 2008 Location: Weed,ca Posts: 2	Re: WIW Double hump heads thanks I will have to check my heads to see if they are double hump I was told the were expensive but I am just learning about my engine and how to work on it so any info is helpful. plus I am learning to weld so I can fix my blazer



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