Why would you want to put in a crappy cannon like the Oldsmobile?
ack-ack
We got lucky, the 213C would have been mountable in the K4 and Ta152.
These would work much better.
The Mauser MG 213 was a 20 mm aircraft-mounted revolver cannon developed for the Luftwaffe during World War II. It was never put into service, but the principles formed the basis for several post-war developments by the Allies. A 30 mm version was developed as the MG 213C or MK 213 and it was this that led to the British ADEN, French DEFA and American M39 cannon.
20-mm-MG213C:
##Caliber: 20 × 146 mm
##Weight: 75 kg; Assembled weight 96 kg
##Lenght: 1930 mm
##Barrel lenght: 1600 mm
##Rate of fire: 1200–1400 rounds/min (~21 rounds/s)
##Muzzle velocity: 1050 m/s
30-mm-MK213C:
##Caliber: 30 × 146 mm
##Weight: 75 kg; Assembled weight 96 kg
##Lenght: 1630 mm
##Barrel lenght: 1300 mm
##Rate of fire: 1000–1200 rounds/min (~19 rounds/s)
##Muzzle velocity: 530 m/s