I have a ZBA code engine out of an 82'vette in my airboat. is this a 2 or 4 bolt block? does it have good rods and crank?  

Almost positive it has 2 bolt mains. 9:1 compression, 200 hp, and 285 ft/lbs. of torque. I don't know about the rods and crank.  

It has 2 bolt mains, cast pistons and 9-1 compression. The heads are the restrictive factor if it's been changed to a carb set up. If it's still CFI it can be made to work and make power but I think for a marine app. you'd be easier to do a head/cam/intake/carb combo for your best performance. This engine has no probs with longevity or durability. I know, I have the 84 version with the forged pistons, still a CFI set-up and I daily drive and race it. The 327's were all 2 bolt motors so keep that in mind. Good luck!