I have a bottle of the old ergo 1ad and would like to stack it with 1-T. Should i start with the old 1ad and finish with the 1-T or the other way around? how would i stack them?

That should stack well. I would start them both at the same time to be honest. How long do you plan to run this cycle?
1-T should be run for approx 6 weeks to attain best effects. So if you plan 4 weeks with the 1-AD, you can start the 1-T, and then add the 1-AD in during week 3.
Evolutionary Muse - Inspire to Evolve
Legendary
i plan on running the 1-t 6 weeks. so should i keep the 1ad at 300mg or up the dose?
How is that not expired? Did you freeze it?
Expiration dates are very leinient overall. As long as it's stored in a cool, dark, and climate controlled environment, they'll last well past the posted expiration date with minimum compound degradation. I've vaccum sealed quite a bit of my stuff and put it in the freezer.
Evolutionary Muse - Inspire to Evolve
Legendary