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which heads

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Old Feb 29, 2004 | 06:15 PM
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From: allen,tx
Car: 1985 Iroc-Z
Engine: 305
Transmission: t-5
which heads

i have a 92 chevy 350 in my firebird and i was wondering if anyone had a idea on what size the combustion chambers are in cc's
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Old Feb 29, 2004 | 07:48 PM
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From: Palm Bay, Florida, USA
Car: 95 E-150 & 07 Kawasaki ZX-6R
Engine: A slow one & a fast one
Transmission: A bad one & a good one
Axle/Gears: A weak one & a chained one
64cc, from what I've read.
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Old Feb 29, 2004 | 07:55 PM
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Small valve 64cc if the heads are original.

Pop off the valve cover, and get the numbers off of the head. They are stamped in on the head itself.

Most of the L98 iron heads are 083's....

1.94 intake / 1.5 exhaust valves.

Not too bad when cleaned up a bit...especially for a mild street 350.
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Old Feb 29, 2004 | 08:03 PM
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From: Palm Bay, Florida, USA
Car: 95 E-150 & 07 Kawasaki ZX-6R
Engine: A slow one & a fast one
Transmission: A bad one & a good one
Axle/Gears: A weak one & a chained one
Small exhaust valves, but the intake valves are frickin huge.
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Old Feb 29, 2004 | 11:29 PM
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From: allen,tx
Car: 1985 Iroc-Z
Engine: 305
Transmission: t-5
i just saw that i wrote that wrong i left out that the motor was a 92 truck motor what where most of those heads cc's
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Old Feb 29, 2004 | 11:31 PM
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From: allen,tx
Car: 1985 Iroc-Z
Engine: 305
Transmission: t-5
?

Last edited by f355bird; Mar 2, 2004 at 12:03 AM.
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Old Mar 1, 2004 | 03:08 PM
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TRuck motor huh?

Good points....

It's more than likely a 4 bolt main...great conversation topic to drop on a street motor...sounds cool too...


Bad points...

Those heads SUCK!!!!!

305 TPI heads flow better than TBI heads. Chuck 'em.
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Old Mar 2, 2004 | 12:01 AM
  #8  
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From: allen,tx
Car: 1985 Iroc-Z
Engine: 305
Transmission: t-5
i am chunking them im getting a set of trickflows that is the reason why i wanted to know the cc's of those heads so i can order the right heads to get my compression where i want it.
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Old Mar 2, 2004 | 07:16 AM
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64cc... more than likely 1.84 intake / 1.5 exhaust valve. Get the last three numbers from the casting # on the head itself and I can tell u for sure.
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Old Mar 20, 2004 | 08:01 PM
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From: las vegas
Car: '92 droptop bird
Engine: 5.7L,mild cam etc.
Transmission: modded 700r4 w/2600
5.7s came with 64cc and 1.94int. and 1.50 ex only!(87-96)truck and the f-bods 5.7 64cc,1.94-1.50 the 5.0 had 58cc and way small valves
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