Question about P&W R-1830-S3C4G Twin Wasp to R-2000-2SD13G Twin Wasp?

A question if I may gents regarding to those knowledgeable in aircraft radial engines please!

I am reading up on the Australian Commonwealth Aircraft Corporation CA-12, CA-13 and CA-14 Boomerang ’emergency’ fighter, which was designed and built in answer to Australia’s lack of taking it’s own defence seriously.
So desperate was the Australian Government, for a fighter to stem the seemingly inevitable Japanese avalanche, that the brilliant Lawrence Wackett, in an effort to save time (and more importantly sensing the reality of the situation) based the Boomerang largely on the Wirraway (itself an Australian development of the North American NA-16 training aircraft.).
Wackett elected to design and build the Boomerang around the most powerful engine then available in Australia – this being the was Pratt & Whitley R-1830-S3C4G Twin Wasp radial piston engine, which was rated at 1,200 hp (895 kW). A wise and sensible decision I think at the time, as the engine had been selected by the RAAF over that of the standard British Bristol Taurus radial engine to power the licence-built Bristol Beaufort torpedo bombers, then being built in Australia.

From what I have read thus far, one of the biggest problem with the Boomerang was its lack of power and high-altitude capability.

Not knowing a brass razoo about aircraft engines, I am enquiring as to how much effort and technical difficulty Australia would have face modifying its Pratt & Whitley R-1830-S3C4G Twin Wasp radial piston engine production to a more powerful variant the likes of the Pratt & Whitley R-2000-2SD13G Twin Wasp radial piston engine of 1,450 hp (1,081 kW) or

-Was there a lot of comparability between the two engines?

-Is the Pratt & Whitley R-2000-2SD13G Twin Wasp in the same comparable time frame as the Pratt & Whitley R-1830-S3C4G Twin Wasp?

-Was there much weight or dimensional difference in the same engines?

– Would it be a feasible process to modify and undertake production of the R-2000-2SD13G Twin Wasp in place of the R-1830-S3C4G Twin Wasp?

Thanks in advance for your time and assistance in advance

Regards
Pioneer