forget about intitial timing and concentrate on the TOTAL timing, and at what RPM it is all in at..................you need to find out what mechanical advance your distributor is supplying at a given RPM........most stock distrijbutors will get you 18-22 mechanical........you can taylor your total by limiting or adding either initial or mechanical, as well as spring tension to get the TOTAL desired for best performance....
my old 400 liked about 40 TOTAL for best performance.....every engine will be different...
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile
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