198 slant distributor

My car at top dead center , my distributor is pointing to about 5 o'clock spot which some slant firing order say is correct but others say #1 should be at 6 o'clock position .

Which is it ? Lol

my slants distributor only moves 3/8 of inch back and forth and neither end of that spectrum gets me even close to where I want to be . And would new head cause this ?

can the distributor but pulled and moved a few teeth over and put back ?

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