A 350 Chevy bored 60 over and stroked 6 inches is a fairly common modification for these engines. It is typically done to increase the engine's displacement from 350 cubic inches to 406 cubic inches. This can result in a significant increase in power, depending on the other modifications that are made to the engine.
In order to bore a 350 Chevy over 60, the engine block will need to be machined. This is a relatively complex and expensive process, so it is important to weigh the cost and benefits before deciding whether or not to do this modification.
Stroking a 350 Chevy 6 inches is also a relatively complex process, but it is not as expensive as boring the block over. The most common way to stroke a 350 Chevy is to use a stroker crankshaft. A stroker crankshaft is longer than the stock crankshaft, which increases the piston stroke.
Boring and stroking a 350 Chevy can be a great way to increase the engine's power. However, it is important to weigh the cost and benefits before deciding whether or not to do these modifications.