The only way to do a stroker is to run Aussie Holden XU1/XT5/XT6/Starfire or IX Toyota rods on the existing crank.
They have 1.9" crank pins, not 2.124". This allows you to get a 3.35" stroke without hitting the camshaft. This is about the same as the HSC 2300 cranks stroke. The 221 3.46" Stroke crank may just fit if you run Holden rods, but the psitons come out of the block!
It will take the car out to 216 cubes if you run the 30 thou over custom pistons. The pistons need to be forget two or three ring, 0.875" tall in deck height, an have to be custom made by Wiseco with a 0.866" wrist pin.
It's easier to get a 221 or 250 block, rather than spend a motsa on stroking the 200.