What if Bomber Command had used the Shackleton as a ground attack, reconnaissance and support aircraft due to the uprisings and minor disruption in Africa, the Middle East and the Far East.
The Avro Shackleton GR.2 would have been fitted with a tail turret, something along the lines of the Avro Lincoln B.2, could use the rear tail turret from a Shorts Stirling.
I have no doubt that a few of the Avro Shackleton GR.2s would have been fitted with side blister guns and or a remote controlled under the fuselage gun similar to the Consolidation B-24 Liberator or the Boeing B-17 Flying Fortress/B-29 Superfortress.
The thought of the Avro Shackleton GR.2 been kitted out in the similar fashion to the Douglas AC-47 gunship is another project, well you can never have too many Shackleton kits!

I will be using the 1/72 Airfix Avro Shackleton MR.2 for this build and the leftover bombs of the Vickers Valiant B(PR)K.1 kit. I think that I might have the rear tail turret of a Shorts Stirling if not I can use the M.A.D. boom from the Mach2 Breguet Br.1150 Atlantic. This would allow the detection of convoys, tanks and artillery movements in jungles / obscured by trees or at night without the need of a searchlight which would alert the enemy to their position.
The maintenance crews would have put armoured plating in the vulnerable areas of the Avro Shackleton GR.2s as it's susceptible to ground fire.
 No doubt with the Avro Shackleton MR.3 entering service there would have been a Avro Shackleton GR.3 which would have had the guns from the GR.2 or the candidate for the gunship variant.
I do have a build which can be recycled for the gunship but has jet engines and a V-tail.