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Old 05-15-2012, 01:07 PM
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heads sbc

casting number 376450 are these good head for a 350 sbc

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Old 05-15-2012, 01:56 PM
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Quote:
Originally Posted by nick8959
casting number 376450 are these good head for a 350 sbc
Define good. These are 305 heads. They have a aprox 60cc chamber and small 1.72" valves.

The best of the 305 heads fora a 350 are the 4416 casting.
Not bad with judicious porting and larger 1.94x 1.60 valves.

If you just bolt any of these stock as cast 305 heads on a 350 keep your expectations modest.

The 450 castings are not the desirable 305HO heads if you actually want power.

If you are replaceing stock 76cc chamber 350 heads the engine compression ratio will be higher cause the 450 head chamber is smaller (aprox 60cc)
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