I also think you'd be much happier with the smaller cam. The Comp cam is about the size of one I'm runnin in my 10>1 eddy headed 451 and it works REAL well on the street. Will smoke street tires for blocks.

Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451