.I upsized the cylinders on my loader and I think it would be equivalent to the 430 loader capacity.
I found on my current tractor the lift capacity is limited by the pumps ability.
by adding larger cylinders does that give your pump the ability to lift more?
does it slow down loader control speed?
What is the load capacity of your front end?
After breaking a tractor frontend twice because the loader was stronger than the tractor I have upgraded to a tractor with greater lifting ability. If the bigger tractor cant lift what I am doing on a regular basis I will get a bigger tractor again. Experience and a lot of age has made me watch what I am doing more closely
OP...If I found myself in a situation where I keep feeling the tractor is going to tip over I would have to rethink why and correct my positioning of the tractor and correct it... not add more counterbalance. or widen the stance more than the tractor was built for.
The good news it because of the compact tractor craze there are a buttload of larger tractors availabe at a great price.
Its really hard to tip a piece of equipment over if its carried low to the ground