To be frankly honest, it's mainly all of the original elements. I did however strip much of the reverb and delay left in the original sample content, beef up the drum track, accentuate the snare hit on the 4th beat to give it more punch. Used Schepp 73 EQ on the main vocal track to add grain. Moog Filter on the other vocal part and some envelope. Tape Delay and pitch drift, wow and flutter and compression using some emulation.
I tried to add more layers by constantly morphing what was happening in the background. The original never had many effects or it seems much processing, so I gave my PC a bit of a workout. And my brain it seems. By the way, strange pad thing was Hollywood Strings. Reversed, tape modulation (Boards of Canada type setting) and voila.
The vinyl effects were added too, some noise and grain, just completely transformed really.
For comparison, here is the original artists mix.
https://www.youtube.com/watch?v=uDZZekWu8u8 So whilst I used much of the original content, I sort of put my own spin on it.