I have a 426 fuel altered with a 390 rear and a 19% first gear. I have been told two different times to shift. Firstly I was told to Shift early then I was told to leave it as long as possible. I left it till just pass half track on our last run and blew the blower off just after I shifted. We are allowed a 1471 20% overdriven. Single pump with no more than 25 gpm. We have no high speed lean out. We did run 171 mph at the 1/8th but a 6.7 and 171 mph at the 1/4. Any advise would be much appreciated.
Tony.
Tony.