have a 2001 Merc 525 short block with cam had bad headers (CMI) pickled cylinders needs to be checked, turns over easy, sell for $4000 sold the corroded heads, but have a super Clean 40 hour set for sale too! asking $2000 for heads , OR buy all for $5000 that will include push rods, roller rockers,head bolts any questions call 727-798-4388 or e-mail [email protected]