I've already asked this question but i'm posting it here b/c I need some quick responses.

I bought a new car and the car will pass emissions with the current motor. I'm gonna pull that motor out and I know the car will NOT pass emissions with the other motor in it. However, my birthday is withing a month, Sept. 22. If I do the emissions now, such as today, can I use that emission to register my car? Or if I get my emissions done now, will I have to register my car, then do emissions again to renew it?

I got some answers in my other thread but we're still not clear on it. Thanks for any help