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10-29-2003 10:49 AM #1
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- Join Date
- Oct 2003
- Location
- Sacramento, CA
- Car Year, Make, Model: 1978 Chevy Pickup
- Posts
- 2
350 Engine w/305 heads (cast#: 376450)
Are 305 heads worth putting on a 350 engine. The block is a cast#: 3892657 1964-1967 two bolt main. From what I can gather online, the heads are a cast# 376450 1975-1981 and have a 60cc chamber. with these heads restict the engine or will the small chamber help the compression ratio. I want to build the engine for a street machine but i don't want to get too radical, I still want reliability and longevity. I will be placing the engine into a 1978 Chevy 1/2 ton short-bed pickup.Keep the chrome side up!!!
Jim
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10-29-2003 10:55 AM #2
CHR Member
- Join Date
- Sep 2003
- Location
- Nashville, baby!
- Car Year, Make, Model: '64 Galaxie 500XL
- Posts
- 304
305 heads.....wheeze!!!
The 305 heads are chokers.
In the old days, people built compression by changing heads. Now days, enough pistons can be had (for cheap) that will build compression, so you can tune your heads for what they do...BREATHE.
Open chambers, big ports, big valves (with all else equal) will always flow better. Let your heads breathe!!!Ensure that the path of least resistance is not you... 
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10-29-2003 11:04 AM #3
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- Aug 2003
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- Oak Ridge
- Posts
- 154
Congratulations, Madgrinder
Congrats on the senior status, Madgrinder.
As Streets told me, "live up to it."
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10-29-2003 11:13 AM #4
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- Oct 2003
- Location
- Sacramento, CA
- Car Year, Make, Model: 1978 Chevy Pickup
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- 2
Thanks "Madgrinder". I was thinking on the same line but I wanted to make sure. What heads would you recommend?
Some heads that wont cost a small fortune...Keep the chrome side up!!!
Jim
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10-29-2003 02:18 PM #5
CHR Member
- Join Date
- Aug 2002
- Location
- Mill Creek, WA
- Car Year, Make, Model: 1966 Oldsmobile 442
- Posts
- 45
The new 64cc cast iron vortech heads can be had for about $400 fully assembed with springs and valves, have acc bolt holes, have Hardend Seats for unleaded gas and flow much better than even the old Camel Hump heads.
http://www.sallee-chevrolet.com
http://www.sdpc2000.com
Tough to beat for the price...Ben
1966 Oldsmobile 442
1968 El Camino SS396 (Sold 2009)
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10-29-2003 02:22 PM #6
CHR Member
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- Jun 2003
- Location
- San Francisco
- Car Year, Make, Model: 54 Plymouth Savoy
- Posts
- 256
The Fastburns are in the same price range I believe. Not sure on the pros and cons of one over the other.Justin RFFR
Isaiah 40:31
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10-29-2003 02:45 PM #7
CHR Member
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- Jun 2003
- Location
- Cahokia
- Car Year, Make, Model: 48 Chevy 1ton Bus
- Posts
- 2,499
the old 2-barrel 327/350 heads were 1.720 intakes and they ran fine with a 2BBl. 4 barrels won't work well with them but a big 2bbl will. 305=1.840 valves.. joeDonate Blood,Plasma,Platelets & sign your DONORS CARD & SAVE a LIFE
Two possibilities exist:
Either we are alone in the Universe or we are not.
Both are equally terrifying.
Arthur C. Clarke
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10-29-2003 05:48 PM #8
CHR Member
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- Sep 2003
- Location
- Nashville, baby!
- Car Year, Make, Model: '64 Galaxie 500XL
- Posts
- 304
big 2-barrels
The best large-bore 2-barrels I've found have been the Holley 4412, and some of the early Motorcraft/Autolite 2100's.
The 4412 is like half of a 4150 4-barrel, and you can put the adjustable metering plate from Barry Grant on it just like the 4-barrel.Ensure that the path of least resistance is not you...
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10-29-2003 07:06 PM #9
CHR Member
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- Jun 2003
- Location
- Cahokia
- Car Year, Make, Model: 48 Chevy 1ton Bus
- Posts
- 2,499
NOT a 64-67 block.. just a '67 block ..350's weren't made in '64-'66 and in '67 they were small journals like the 265-327's are...Donate Blood,Plasma,Platelets & sign your DONORS CARD & SAVE a LIFE
Two possibilities exist:
Either we are alone in the Universe or we are not.
Both are equally terrifying.
Arthur C. Clarke
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Visited a family member at Dockery Ford from the time I was 1 year old through their ownership and then ownership change to Morristown Ford. Dockery was a major player in the Hi Performance...
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