The first Gundam series that aired all the way back in 1979 was Mobile Suit Gundam. As above picture you can see FF-X7 Core Fighter that used in RX 78-2 Gundam, RX 75-4 GunTank and RX 77-2 Guncannon and for the specs you can read it in here
My friend Wanda Bachtiansyah who also a PERI member has agreed to share his design work on this fighter plane. You can download the pattern in JPG or in PDF. And the instruction will be updated, but you can see the picture below as your references. For the scale of the model will be 1:35, that's a perfect one for military diorama.
I hope this will be a great model for you to built, stay tuned on my blog for the instruction.