2nd edition. heavy bombers is a technology advancement just like long range aircraft, etc. Heavy bomber roll 3 or 4 dice per plane per attack. I also have the cheesy PC version.
You should try the edition that is out now. All the "house rules" that we used to use... most we came up with on our own... are in the rulebook as optional now. And we thought WE were the only ones who added to the game

They added hidden sub movement, offshore bombardment, destroyers, artillery, paratroopers... and now all the pieces look like units from the country they go with. Panzers, Zeros, P-38's... Same basic game we played back then... just a lot more goodies.