Restoration Advice Please

FABO, looking for some advice from other members that have "been there & done that". Maybe just what you learned through your own restorations.

I'm currently restoring a 1970 Duster. I've finished the body work and have the car in primer. The front suspension is in, and so is the rear end, brakes are done, steering box is in. So, I've got a shell on wheels right now.

I'm debating what to start on next. I'd like to try and plan out the work in a way that makes the most sense.

I have: wiring kit, dash, sound deadener rolls, 4 speed conversion parts, headliner and interior kit, steering column

I do not have: engine or accessories, dash gauges, stereo

Hopefully, some of you can shed some light on this.

Thanks FABO!