Hi I have purchased a super 88 diesel, I think it is a 56'.  I have been using it in &quot;stock antique pulls and Of course I want more power.  The tractor has the high ratio final drive and a wide front no power steering.  Now a few questions.  Can I go bigger than 283 ci?   What size valves can i go to in the head?  What is the deal with the valve seat recession in the head?  is there another style intake manifold for this engine that would give it a little more flow?  What model narow front or even single front tractors could be the donor?  could the 88's or even the 880's have the hydra power box as a factory option?  Are ther different injectors available for this engine/  I was thiking if I could get an injector that sprays a little mor fuel directly into the comb. chamber, and raise the c/r a bit by milling the head I could get a more efficient burn?  If any body has a clue as to what I want to do your help would be appreciated.  And I would rather not hear from those that are going to tell me to buy a gas tractor and be done with it, because that would be too damn easy!