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Sounds like someone put a two barrel carb and a set of mufflers on it. 3 carbs-2 MSD boxs-2 fuel pumps-3 sets of plugs-cap&rotor. all been change. check valve lash 5 times ! springs look ok not that old-Just took the front of the motor apart everything on the timing chain looks great. also change it from e-85 to gas no change. timing is rock solid. 18-34 .
nothing in the oil filter. compression test good 100-170 . will not rev up..not crisp and clean. What else to check- ideas..split them out !






What? 100psi is barely enough to fire a cylinder..




Chris..