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Make sure you have a 8n head,,,a 9N,2n head is rated a few less HP,,, go with 3 ring pistons,,, 4 ringers have more drag. Use .090 sleeves If the block deck needs resurfacing install the sleeves first,,, if the deck is in good condition leave it B Go to work on the head resurface it,,, theirs plenty of meat to grind for relief,,, I have not had valves hit'n the head but the piston will. Relieve till with the head on the block with no gasket the pistons will not lift the head. I run free rotating exhaust valves,,, PITA to set up,,, worth it to me,,, not for a beginner,,, Thales high dollar tools to git set up rite,, about 2 hours added to the job with the rite tools. A good werk'n distributor is a must for optimum performance,,, if you don't know much about how the advance works,,, its money well spent to pay someone to set it up You will benefit from 12Vs if you are look'in to git the most out of it. Remove the air filter assay and unroll the wire mesh,,, git it clean and free flowing. Make sure the intake on the cleaner is as clean as a whisel. Its a tractor,,, werks in dirt,,, needs the oil bath filter. Run a thermostat Lots of folks run big tires,,, 11.2s are more than enuff Run 134D fluid in the trans/diffy Use 15/40 or 20/50 engine oil Plenty of other things one could do if he had the knowledge,,, not worth it to me,,, I am the rabbit,,, till I git caught and passed
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