Ive been reading alot on the pros of vacuum advance but my hotrod runs better without it! ( maby im doing something wrong) 1963 nova 327, HEI, big unk cam, 3000 stall, 10:1 comp, 373's, holley 650, single plane intake. With vacuum advance it dies in gear and in park idles around 1300. Seems to run much better without it ( better idle in/out of gear). However I have noticed hotter temps and more fuel use without it. So how can i get this thing dialed with vacuum advance? Initial timing is @ 13 and all in by 3200. Do i need to recurve or get an adjustable can? Ive also searched for vacuum leaks, none. Also tried ported and manifold. Whats next?