I have a good crankshaft from a 3 seater 1994 ish with a 587. Currently it is in the original case, but I can remove it if nec.

$100 crankshaft only(pluse shipping)
$135 bottom end: case, crank, rotory valve gear, blancer(plus shipping)

Other parts are available as well. Let me know if you need anything else.
Also have parts from a 1994 SPX as well.