4 to 8 degrees before top dead center
Changing the cyl bore does not affect the ignition timing of the engine.
even with a cam it should be between 10 an 12 degrees
There is no set timing for this specification. If you are using a mechanical advance distributor rather than a computer you will initially target 35 degrees total advance over 2500 rpm with an idle setting of 10 degrees with out vacuum advance. From there experimentation to determine most effective setting for your engine.
The bore adds about 10 cu. inches to make it a 337
its called nothing because you wouldn't have a ENGINE left if you bored it 4" over
A 289 bored .030 over.
A 262 bored 30 over.
A 427 bored .60 over is 438.8572417 or basically a 439.
That would be called a Chevy 307 bored .40 over.
332
10 degrees with a stock cam
16 degrees btdc.