Pretty possible, all it'll need is either different rods or pistons.
3k-h block, rods and pistons fitted to a 4k crank.
4k rod at the top
3k-h at the bottom
Back of the block
Counter weight hits the piston towards BDC. As can be seen the rods cap can't be fitted
Past that point the cap can be screwed down. But around the half mark number one rod jams up on something.
I'm not sure what it is can't see anything hitting
Piston sits about 3mm proud