When new, an A+ would have had marks on the pulley, and maybe the flywheel (not sure).
To add a TDC mark to the crank pulley:
1. remove spark plugs
2. find an old pushrod, borrow a dial gauge and magnetic base.
3. turn motor until as near possible to TDC in #1 cylinder (you can see the piston)
4. clamp the magnetic base to top of head near the thermostat, so it doesn't rock about.
5. sit pushrod in the plughole and hold as vertical as possible. position dial gauge stem in the top of the pushrod. Clamp the mag base.
6. rotate motor until reading is max on dial gauge, this is TDC.
7. cut a groove in the pulley at TDC mark on cover (the rearmost mark).
_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
