are these heads good?
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Senior Member
Joined: Nov 2007
Posts: 744
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Car: 1983 Camaro Z28
Engine: 383
Transmission: TKO 600
Axle/Gears: Strange S60
are these heads good?
i have a set of 350 heads off a 1972 350. it came out of a camper special truck.
the casting number is 1688688, i couldnt find anything on them.
three other numbers were gm56, b162, and 21. what do there numbers mean? and are these heads anything good?
the casting number is 1688688, i couldnt find anything on them.
three other numbers were gm56, b162, and 21. what do there numbers mean? and are these heads anything good?
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From: Charles County, Maryland
Car: 2000 BMW M5
Re: are these heads good?
There is no such chevy head w/ that casting #, some of those digits must be incorrect. As a general rule, no Gen I chevy head that the factory ever used, is "good" in stock form. If you are building an engine, at least starting with some $800 iron Dart or World heads is going to put you ahead of the game vs. rebuilding stock heads.
Thread Starter
Senior Member
Joined: Nov 2007
Posts: 744
Likes: 1
Car: 1983 Camaro Z28
Engine: 383
Transmission: TKO 600
Axle/Gears: Strange S60
Re: are these heads good?
i read them upside down, they are 3998991. i just dont have a lot of money to work with, how are camel hump heads?
truck heads 75 cc...
truck heads 75 cc...
Last edited by brodysZ28; Sep 17, 2008 at 11:29 AM.
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From: MA
Car: '87 IROC/'68 SS
Engine: 5.7L/350
Transmission: 700R4/Muncie 4-spd
Axle/Gears: 3.27 9 bolt / 3.31 12 bolt
Re: are these heads good?
3998991....72-73...307/350......75cc chambers
Nothing special, but decent stock heads IMO.
Nothing special, but decent stock heads IMO.
Thread Starter
Senior Member
Joined: Nov 2007
Posts: 744
Likes: 1
Car: 1983 Camaro Z28
Engine: 383
Transmission: TKO 600
Axle/Gears: Strange S60
Re: are these heads good?
yea i agree, and with 75 cc chambers my compession ratio would be way too low wouldnt it?
i am looking at a pair of 68 cc heads right now, do you know what my compression would be with that?
i am looking at a pair of 68 cc heads right now, do you know what my compression would be with that?
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Joined: Oct 2002
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From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Thread Starter
Senior Member
Joined: Nov 2007
Posts: 744
Likes: 1
Car: 1983 Camaro Z28
Engine: 383
Transmission: TKO 600
Axle/Gears: Strange S60
Re: are these heads good?
eagle 383 kit
http://store.summitracing.com/partde...0&autoview=sku
eagle crank, rods, speedpro 12cc dished pistons
this cam
http://store.summitracing.com/partde...K&autoview=sku
headgasket could be anything if i put those heads on, idk what it is now.
http://store.summitracing.com/partde...0&autoview=sku
eagle crank, rods, speedpro 12cc dished pistons
this cam
http://store.summitracing.com/partde...K&autoview=sku
headgasket could be anything if i put those heads on, idk what it is now.
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