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do 305 heads have potential?

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Old Mar 15, 2003 | 11:14 AM
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MTchevy1's Avatar
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From: Chicago, IL
Car: 94 s10, 97 s10
Engine: 383cid, 350cid
Transmission: 4L60, NV3500
Axle/Gears: 3.73, 4.10
do 305 heads have potential?

I've got 3 sets of 305 heads laying around (freebies, heads I've replaced) and I was wondering if they could be made into something decent. They've got small chambers, so I was thinking that if they could be machined to take some 1.94's they might be decent. Has anyone done this? If so, how were they? Thanks
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Old Mar 15, 2003 | 12:43 PM
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Search for posts from Sitting Bull on 305 or 416 heads. He's made them work nicely on a 305. As for bolting them to a 4" bore engine, that may be a different story entirely. If you're gonna trash them, let me know first.
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Old Mar 15, 2003 | 03:11 PM
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From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
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Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
They work just great with porting and larger 1.94 x1.60" valves.
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Old Mar 15, 2003 | 04:12 PM
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I posted something on this about a month or so ago....what could be done to these L03 heads

what is the stock int/exh

1.80/1.50?
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Old Mar 15, 2003 | 07:16 PM
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From: Calgary, Alberta, Republic of Western Canada
Car: 1986 Sport Coupé
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LO3 heads are not good for porting. Get 081, 416 or 601 castings.

Yes, they have 1.84" intake valves stock.
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