Your intake has an operating range of idle to 5500 rpm (stock). You need to select a cam that will operate successfully in that RPM range if you want it to run right. If you stuff a real big cam in there it will run like shit!
Go to the COMP sight and look at the FE cams, they clearly show the RPM range. ww
![[linked image]](http://i226.photobucket.com/albums/dd31/65cobrajet428/cj_engine_1r.jpg)
![[linked image]](http://i226.photobucket.com/albums/dd31/65cobrajet428/390_pi_engine023r1.jpg)
![[linked image]](http://i226.photobucket.com/albums/dd31/65cobrajet428/engine_stand-04c-1.jpg)
1965 Galaxie 500XL 445ci Stroker C-6
1965 Galaxie 500XL 390ci P-Code, 4-Speed
2001 Ford F-150 SuperCrew 5.4L
2006 John Deer X320 Garden Tractor