you definitely want to have ag tires for dirt tracks and turfs for blacktop. go to the max size the rules allow . you can advance the ignition timing and do a good 3 angle valve job. usually a stock piston and rod don't always come to the top of the block so if you assemble it, measure the difference you can take some off of the block. you can mill the head. just leave a bit of a lip on the head so they don't complain that you took to much off. it don't say you can't run a steel flywheel so I get 35 lb steel flywheel and hang that on there.
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