305?350?

Are there any visual diferences between the 305 and the 350 on a 91 Z28. Other than the ID #

Nope.. not without pulling the heads off

only difference between the two engines, are the bore (4.00 on the 350 and 3.736 on 305), pistons (because of the bore), and the water jackets, which is why you cant bore a 305 out to a 350. aside from that they are identical engines. same crank, same rods, same mounting locations everything.

yeah, but what's the stroke???

both have the same exact crank, 3.48in stroke