need some info and ideas - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**bigmac73** · 07-15-2014, 08:47 AM

I have a set of these heads in the garage, a buddy bought them for his truck and put them on, then after starting , started getting milky oil and a crack was found in the block, so to me they are basically brand new, just have a few mins of idling on them,

are they just a stock replacement, are they 305 heads?? Not for sure what to do with them

http://www.summitracing.com/parts/na...8060/overview/

**PGSigns** · 07-15-2014, 09:44 AM

It is the Vortec head. A good head for a street engine. Does take a matching intake.
Jimmy

DBD · 07-15-2014, 10:38 AM

decent heads good for about 1 hp per cube. lift limited to about .460. requires self-aligning rockers, centerbolt valve covers and a vortec intake.

self aligning rockers: http://www.summitracing.com/parts/na...make/Chevrolet

take-off valve covers can be bought cheap from eBay.

Edelbrock performer eps vortec. http://www.summitracing.com/parts/edl-20214/overview/

use the felpro 1094 mls gasket if the engine is stock.

check valvetrain geometry - may need custom pushrods.

**bigmac73** · 07-15-2014, 02:34 PM

any good cam suggestions, for some get up and go

DBD · 07-15-2014, 03:09 PM

compcams extreme energy 4x4 12-231-2 or 12-235-2. you could hit retainer clearance issues with -235, but it's rare.

07-15-2014, 08:47 AM	#1
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	need some info and ideas I have a set of these heads in the garage, a buddy bought them for his truck and put them on, then after starting , started getting milky oil and a crack was found in the block, so to me they are basically brand new, just have a few mins of idling on them, are they just a stock replacement, are they 305 heads?? Not for sure what to do with them http://www.summitracing.com/parts/na...8060/overview/ __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

07-15-2014, 09:44 AM	#2
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: need some info and ideas It is the Vortec head. A good head for a street engine. Does take a matching intake. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

07-15-2014, 10:38 AM	#3
DBD Registered User Join Date: Jul 2014 Location: Seattle, WA Posts: 267	Re: need some info and ideas decent heads good for about 1 hp per cube. lift limited to about .460. requires self-aligning rockers, centerbolt valve covers and a vortec intake. self aligning rockers: http://www.summitracing.com/parts/na...make/Chevrolet take-off valve covers can be bought cheap from eBay. Edelbrock performer eps vortec. http://www.summitracing.com/parts/edl-20214/overview/ use the felpro 1094 mls gasket if the engine is stock. check valvetrain geometry - may need custom pushrods.

07-15-2014, 02:34 PM	#4
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: need some info and ideas any good cam suggestions, for some get up and go __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

07-15-2014, 03:09 PM	#5
DBD Registered User Join Date: Jul 2014 Location: Seattle, WA Posts: 267	Re: need some info and ideas compcams extreme energy 4x4 12-231-2 or 12-235-2. you could hit retainer clearance issues with -235, but it's rare.



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