custom window relay 71 mustang

I'm Working on a custom 71 mustang, it will have door poppers and power windows. The windows will be in the upper window track when the doors are closed. And I will be needing to develope a relay system that will allow the windows to drop down when the remote it's activated, But before the door popper engages. Any ideas? I've been researching timed delay relays, just wondering if anyone has any ideas. Thanks.

Anybody?

i owned a 71 and unlike the new style cars the window had no upper track just sat up against thr weatherstrip therefore opening door created no issues with window up, or are you fabricating your own door frames etc.?