OK THIS IS WHAT WE DID W STOCK ENG. REPLACED BENT HEADER W STOCK HEADER ( UNTIL A CVEC COMES IN THAT WE ORDERED) SET ALL ADJ TO FAC SPEC. ENG STARTED W LITTLE OR NO PROBLEM. AFTER IDLING FOR APPROX 5MIN AND SHORT THROTTLE BURSTS IN BETWEEN. OUR TEMP AT IDOL WAS 235 TO 240 WE DIDN'T EVEN RUN A HALF TANK!. DAY 2 SAME DEAL BUT ACTUALLY RAN 3/4 TANK OF FUEL OUT OF TRUCK THIS TIME. ALL THE WHILE RICHENING UP AS THE TEMP WENT UP AND UP TO APPROX 340.WITH MORE TUNING WE DID GET THE TEMP TO APPROX 300. WE DID THE PINCH TEST TO SEE IF THE LSN WAS OK AND IT WAS. AFTER WE QUIT RUNNING OUR HSN WAS OVER 7 1/2 TURNS OUT!! CAN 30% NITRO MAKE THAT AMOUNT OF DIFF IN TEMP OR IS IT TIME TO REPL THE ENG THE THING SEEMS TO HAVE GOOD COMPRESSION AND IDOLS FINE.