I heard this bolck is still razorback in very early production(Only 4 were produced).Never see that before. It should be look like a P51B/C which mounted 6 machineguns.Could someone offer pictures,please?8)
"Four P-51D-1-NA Mustangs had been completed with the original B-type canopy before the first P-51D-5-NA model (company designation NA-109) rolled off the production line."