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350 heads on a 305 - What head gasket?

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Old Jan 19, 2010 | 07:59 PM
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350 heads on a 305 - What head gasket?

Would you want to run a 305 size bore gaskets or a 350 size bore gaskets if your running a set of 350 heads on a 305
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Old Jan 19, 2010 | 08:17 PM
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Re: 350 heads on a 305 - What head gasket?

either one 350 may be cheeper,may kill compression going with 350 heads.
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Old Jan 19, 2010 | 08:25 PM
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Transmission: 700r4, 700r4, t-56
Axle/Gears: 327, 308, 373
Re: 350 heads on a 305 - What head gasket?

heads are 54cc
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Old Jan 19, 2010 | 09:15 PM
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Engine: Modded , stock, LSX modded
Transmission: 700r4, 700r4, t-56
Axle/Gears: 327, 308, 373
Re: 350 heads on a 305 - What head gasket?

What about the gaskets?
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Old Jan 19, 2010 | 09:36 PM
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Re: 350 heads on a 305 - What head gasket?

Don't think it makes any difference;

From Jegs:

Mr. Gasket #720-6100G

# MLS Premium Overhaul Gasket SetSB-Chevy 283-350 1958-85
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Old Jan 19, 2010 | 11:46 PM
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Re: 350 heads on a 305 - What head gasket?

Originally Posted by tom3
Don't think it makes any difference;

From Jegs:

Mr. Gasket #720-6100G

# MLS Premium Overhaul Gasket SetSB-Chevy 283-350 1958-85
No head gaskets are made for individual bores not just small block or big block. I'd run the 305 gaskets.
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Old Jan 20, 2010 | 12:13 AM
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Re: 350 heads on a 305 - What head gasket?

What heads are they? You should try to use the 305 gasket if possible but sometimes the chambers on the 350 heads are larger than the bore (and gasket bore) and can cause sealing issues.
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Old Jan 20, 2010 | 10:17 AM
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Car: 84 camaro, 88 trans am, 98 camaro
Engine: Modded , stock, LSX modded
Transmission: 700r4, 700r4, t-56
Axle/Gears: 327, 308, 373
Re: 350 heads on a 305 - What head gasket?

There converted Stock gen2 LT1 heads
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Old Jan 20, 2010 | 10:02 PM
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Car: 84 camaro, 88 trans am, 98 camaro
Engine: Modded , stock, LSX modded
Transmission: 700r4, 700r4, t-56
Axle/Gears: 327, 308, 373
Re: 350 heads on a 305 - What head gasket?

hmmmm, well anyone? the heads have 1.94s and 1.5s id guess a 305 gasket would work but id like to know for sure
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Old Jan 20, 2010 | 10:55 PM
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Re: 350 heads on a 305 - What head gasket?

Pretty sure that chamber is too large to cover the 305's gasket hole.
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Old Jan 21, 2010 | 10:00 AM
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From: Heart of Dixie
Car: 1987 Camaro Sport Coupe
Engine: 355
Transmission: 700R4
Axle/Gears: 7.5 inch 342
Re: 350 heads on a 305 - What head gasket?

Originally Posted by FueledSoul
There converted Stock gen2 LT1 heads
Got any pics i would like to see them?
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Old Jan 23, 2010 | 05:41 PM
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Car: 84 camaro, 88 trans am, 98 camaro
Engine: Modded , stock, LSX modded
Transmission: 700r4, 700r4, t-56
Axle/Gears: 327, 308, 373
Re: 350 heads on a 305 - What head gasket?

once i get them put together im waiting on my porting kit, im going do a mild port and polish job them then have them decked. thats why i need the gasket to get it ready to drill the new holes for the coolant after decking
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Old Jan 23, 2010 | 11:14 PM
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Re: 350 heads on a 305 - What head gasket?

Originally Posted by BASSETT IROC 85
either one 350 may be cheeper,may kill compression going with 350 heads.
if u run aluinium heads it wont kill that much power tho plus lighter to positives
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