It is now a 355 CID.
Its a 355 cubic inch
355
No. They ALL came with the standard 4.00" bore from the factory, whether it was a 302, 327, or 350. If it's bored 30 over, it's been rebuilt at least once.
4L80E
355
377
That depends on the components used. It can vary from around 150 to over 1000.
In the mid 300 ish Hp
492 h.p @ 4295 rpm. which would be around 390 ft lbs of tor.
even with a cam it should be between 10 an 12 degrees
455 bored 30 over is now 461ci
30/350 is a fraction.