i HAVE MANY QUESTIONS ON MY 550 AND WOULD LIKE TO TALK TO OTHERS , Not new to Oliver's  or mechanics. I have the 31/2 144 engine found cracks between the sleeves any big problems there see it on Allis all the time. Can you get pistons  or rings for that size? Color for 550 is it meadow green? Can you get checkerbaord grill aftermarket? Will need many parts to restore it and I am not seeing them listed in parts vendors.  <!-- s:twisted: --><img src="{SMILIES_PATH}/icon_twisted.gif" alt=":twisted:" title="Twisted Evil" /><!-- s:twisted: -->