The 660 tank should work on it.You might be able to fix that tank with a sodering iron.I have fixed them that way before.How are the crank berings?
This is a MS660. PN 1122 350 0853 was listed as a 066 tank and I need to know if it is the same. I know the early 066 had a smaller case and then switched to what I think is the same case/tank as the MS660. I don't know which case this PN fits.