[Ol' Ron]

Every engine needs it's own advance curve and the chevy dist is the easiest to adjust . Working with Richard, we've changed the timing curves dozens of times to find what works and what doesn't. We also used a wide band /F meter to determine the amt of fuel we needed for both Power and economy. This takes time and detacation. The Vacuum advance is key to both and again you can buy adjustable ones to suit your application.