I would avoid the old 2.4 engines like the plague, as they use SHORTER rods than standard, so combined with a big stroker crank, the rod angle goes to rat shit and they get horribly vibrationary above 5500rpm (ideal for towing caravans though ).

The best stroker conversion is obviously one that uses a rod angle BETTER than standard (or no worse at the very least). The only way to do these with any big success is to use a taller block. You then have the best of both worlds - improved rod angle and larger capacity.

My own engine is a half way house, it has fractionally better rod angle than standard and with a bigger bore (93mm, which is the limit on a standard linered block IMO before wall thickness becomes an issue), and with a 82mm crank and custom rods (8mm longer than standard) and custom pistons (shorter compression height), it achieves 2225cc.