Dinger means me, and yes he is correct, you can hit the acks with bombs. Sometimes you get hit, but you can do it without getting hit also. Fatty I beleive has a video you can watch of him doing it in a F4U. I think it is posted on Lephturns training pages. I have done it in F4U, P51 and P38.
The best way is to dive on acks from 80-90 degrees above, with about 4k of alt above maximum ack height (around 12-14k fields at ground level, adjust for field on plateau). Keep center of gunsight(I have a dot in center) STEADY on target as long as possible, release bomb about 4 to 5k and begin gradual zoom climb pull out with a slight turn, regain alt and do it again. Then you have rockets left, and around 5 of them will take out the tower, or aprox. 4 each for rest of targets. I have found that about a 30-45 degree attack angle and release a salvo of rockets when target fills gunsight will take out a couple more targets(2 salvo's of 4 or 5). Practice, practice and lots more practice and a little luck and you can do it! A flight of 2 or 3 hvy fighters attacking at once will really confuse the ack and insure greater success.
ts