I JUST BOUGHT SOME AFR HEADS FOR MY BIG BLOCK CHEVY AND THEY SAID THE HEAD GROWS ALOT MORE THAN THE REST OF THE VALVETRAIN SO YOU SHOULD SET THE LASH .006 TIGHTER WHEN COLD WHICH A .013 OR .014 WOULD PUT YOU AT .020 WHEN HOT. A GUY I KNOW PUT E-HEADS ON A FORD 428 AND SET THE LASH THE WRONG WAY (.006 LOOSER NOT TIGHTER) AND BENT A FEW PUSH RODS THE FIRST TIME HE REVED IT UP. lIKE GOATMAN SAID .020 TO .022 HOT IS WHERE YOU SHOULD END UP.
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