Front Underbody Panel Attachments

I have a 1990 SW20 with the underbody panels attached normally.
I wish to attach a Rev 3 OEM lip.
Are the attachment points the same for the underbody with the Rev 3 front spoiler.
 
If the attachments stay the same it means every time I need to remove the underbody panel... I have to also take the Rev 3 lip off. PITA if that's the case. Wouldn't think there would be an attachment between the spoiler and body...would leave a gap of some sort.
Are the underbody panels different on Rev 3 cars?
Logically it would seem that the Rev 3 panels would have a deeper front edge to be able to attached to the bottom of the OEM front spoiler.
 
Can anyone enlighten me on what they have done with the Rev 1 panels when putting a later model front spoiler on a Rev 1 Mr2.

I should also mention that without the proper mounting kit, you may not be able to mate up the new lip properly to the lower part of the front bumper, and it may sag and distort over time.
 
It is quite a while since I did this job on my own car, but I seem to remember that it did need a bit of coaxing to get it lined up OK, and there may have been a couple of the original plastic tabs broken.
However, it did fit OK and still looks good after many years with no warping or sagging.
 

mistar2
Thanks Reddtarga
 
To confirm...where / how did you actually mate up the front under panels. Do the under panels mate up to the bottom of the Rev 3 lip. I didn't think that they would reach.
 
Thank you for the reply.

Mine did.