[Rory McNeil]

I have a 331 SB Ford in my 4 speed bracket car, with a flat tappet solid lifter cam. Shift at 6800, 7200 thru the traps at 128 MPH. I have been using Brad Penn Penngrade 1 10-30 oil for years. Also use it in my 427 & 428 Ford FE flat tappet engines.Works great in my buddys solid roller engines as well.