I honestly cant see the z24 crank in an l18 block with 207.85mm deck height
it would mean itll need l24 rods at 133mm, 27mm piston comp height and
rod stroke ratio will be 1.375 impossible.

I do believe an L20b goes in with 31.75mm pistons giving 1.547 but needs the
skirt to be modified to miss the counterweights.

Full sleeving/grouting an L18 to 91mm will give 2237cc

Must be using the L20b block which is 20mm taller.