CA has 83mm bore size... you won't get that out of an A

So their pistons won't work... the rods are the same length at 133mm and the big end is alos 40mm ... but don't know if anyone has actually fitted them to be 100 %
The small end is 20mm so different pistons and pins required or bush the small end

I'd stick to 77mm if you can get away with it... or 78mm max.. some go to 79 but you'd want a sonic tested block to make sure you have the wall thickness... and they tend to get hot faster
Bigger engines give more torque.... thats the biggest advantage
But anything will be a HP increase on 50psi comp