Proform Rollers

got these on my 451 w/ mech. roller and i`m not gonna bullshit ya. i`m nervous as a ***** in church every time i launch. my engine guy says go for it. i say ok but if this thing ***** the bed you`re building me a big stroker w/ sharps.
i made 8 passes shifting at 7200 and no boom! (yet) good luck!