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So why exactly are the 60 foots poor? Others with 4.8s are getting in the 1.5 and 1.6s. What cam are you running?
this track didn't help 60's. recently been running 1.6-1.7 at my other track. don't forget I am leaving off footbrake. don't know of any 4.8 1.5 60ft w/o a tbrake. cam is a lunati 221/221 .558lift.