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As said a can of cooler flush for it and my old shop had a machine to power flush converters but EPA regs put an end to that



Yeah we had one of those machines also but they didn't even do that great of a job IMO

70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake

best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4