mustang303ok guys i need to know at what rpms does a b303 cam pull and what rpms does it stop pulling also i need the same info for an e303 cam starting and stop also if anyone knowsFitment Notice. 1985 Mustang 5.05.8 w factory hydraulic roller cam block; 1986 Mustang 5.05.8 w factory hydraulic roller cam block. May require the stock 5.0 flat-top pistons