In Section 24 page 154 there are confusing instructions concerning the fitting of rivets to join the angles to the firewall.
The instructions are to place two flush rivets (MS20470A4-4) in dimpled holes using the same orientation as the other rivets which are the universal dome head type. The rivets I have labelled MS20470A4-4 from Tote box 4 are universal rivets which are to be placed in dimpled holes which somehow end up flush, in order not to conflict with the heater box as illustrated on page 180.

Can these MS2047OA4-4 universal rivets be finished flush, if so the head or tail?

Is the placement orientation of all rivets from aft fuselage to forward fuselage firewall as it appears in the photo 309 to achieve this outcome of a flush rivet tail?