72 360 first start question

Mophile said

"BTW, for that cam it has 4 degrees ground-in advance, and is a symmetrical cam. So, at equal lift at intake and exhaust, the damper zero mark (slit) should line up at 4 degrees BTDC."

so if I'm at 10 deg. BTDC with my actual TDC mak and this cam should line up at 4 deg BTDC does that mean that my cam is actually sitting with 6 deg. initial advance?

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(1) We'll assume that your newly marked slit is TDC. (2) find exact rockover on either #1 or #6's rockers depending on which ones' companion cyl is on compression. (3) see if the slit is 4 deg BTDC & if not then how far away is it (4) no matter what degree it shows up as in #3, if it is reasonably close (good enough to run) then turn the slit to 15 BTDC & (5) install dist & line up the magnet/confirm rotor is pointing to #1 plug wire (or #6 if #6 is on compression)