Vortec heads need quick answer please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RandyL1966 · 02-05-2010, 05:08 PM

I FOUND A SET OF Chevy Truck 305 rebuilt cylinder heads WILL THEY WORK ON A 1977 CHEVY 350 OR DO I NEED 350 HEADS DOES ANYONE KNOW

clinebarger · 02-05-2010, 05:30 PM

Look for some 350 heads, The combustion chamber on 305 heads are to small. Im sure some of the vortec head gurus will chime in.

RandyL1966 · 02-05-2010, 05:33 PM

THANKS clinebarger

82chevy350 · 02-05-2010, 06:58 PM

They will work but it will raise your compression depending on the cc of the heads.. From what i hear you got good torque but no top end but they will work

*Ticker* · 02-05-2010, 07:48 PM

305 heads are 58cc vs. 64c or 76cc for most GEN I heads. This means your CR would increase by .6 - 1.2 points depending on the piston.

They're generally lousy heads for performance - small valves, poor flow.

I'd pass.

RandyL1966 · 02-05-2010, 08:21 PM

Thanks guy's i'll pass

02-05-2010, 05:08 PM	#1
RandyL1966 Registered User Join Date: Jan 2010 Location: Harper Texas Posts: 208	Vortec heads need quick answer please I FOUND A SET OF Chevy Truck 305 rebuilt cylinder heads WILL THEY WORK ON A 1977 CHEVY 350 OR DO I NEED 350 HEADS DOES ANYONE KNOW

02-05-2010, 05:30 PM	#2
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Vortec heads need quick answer please Look for some 350 heads, The combustion chamber on 305 heads are to small. Im sure some of the vortec head gurus will chime in.

02-05-2010, 05:33 PM	#3
RandyL1966 Registered User Join Date: Jan 2010 Location: Harper Texas Posts: 208	Re: Vortec heads need quick answer please THANKS clinebarger

02-05-2010, 06:58 PM	#4
82chevy350 Registered User Join Date: Sep 2009 Location: Van Buren, AR Posts: 321	Re: Vortec heads need quick answer please They will work but it will raise your compression depending on the cc of the heads.. From what i hear you got good torque but no top end but they will work __________________ Drive It Like Ya Stole It '82 Primer White c10 2wd LWB 350 sbc t350 (Hot Rod) '90 2wd LWB Silverado 350 tbi 700R4 (Daily Driver) '53 m38a1 Willys Jeep (Toy)

02-05-2010, 07:48 PM	#5
Ticker Account Suspended Join Date: Oct 2009 Location: Sammamish, WA Posts: 2,404	Re: Vortec heads need quick answer please 305 heads are 58cc vs. 64c or 76cc for most GEN I heads. This means your CR would increase by .6 - 1.2 points depending on the piston. They're generally lousy heads for performance - small valves, poor flow. I'd pass.

02-05-2010, 08:21 PM	#6
RandyL1966 Registered User Join Date: Jan 2010 Location: Harper Texas Posts: 208	Re: Vortec heads need quick answer please Thanks guy's i'll pass



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