[Keith Tedford]

We used L88 springs although there may be better springs available. I doubt that an L72 or L78 were turning their best ets at rpms over 6K anyway. A friend's L78 with flow benched heads, and a better cam turns its best ets shifting at 6K. Over or under and his times suffer. Take it for what it's worth. Our L72 saw 7200 a couple of times, so these engines certainly are capable of the rpms. Time slips tell the real story. Most people might be very surprised at their ideal shift point.