I've read a lot on the net about adjusting the timing on my 454/350 engines equipped with the Delco Remy EST distributor but there is one thing I don't quite understand. If I'm checking total advance timing at say 3000 rpm I don't need the shunt installed but I can read it in the normal manner with an advancing timing light. Am I correct on this? Some people say I need the shunt installed but I thought that was to get the initial advance of 8-10 degrees.