Does the Motorsports E303( Edelbrock performer roller, crane 2040) cam produce good idle and vacuum?
I have the performer heads on a 289. 9.5 comp. ratio. FMS and Edelbrock says to use the single springs that come with thier heads! Crane and Comp cams says you must use a double spring! Is this because the cam mfg's are considering stock heads?
I have the performer heads on a 289. 9.5 comp. ratio. FMS and Edelbrock says to use the single springs that come with thier heads! Crane and Comp cams says you must use a double spring! Is this because the cam mfg's are considering stock heads?