Stop in for a cup of coffee

Stock 273. Solid Cam and lifters... how do I translate cams.. I'm looking at COMP.. there's a

Duration 306/306, Lift .555/.555

Duration 282/282, Lift .495/.495

Duration 270/270, Lift .468/.468


What does all that translate into? The 270/270 spec has an operating range of 1800 -5800. Seems more in alignment with street cruising?

Should I wait until I find out about potential for overbore?

Also, plan is to run the D4B intake and a Holley 4160...600cfm