Jacks: 69 cuda fastback

Forgot to take pictures but I repulled the dash/gauges to redo a spot, and touch it up, do A lil more wirng work. Also completely cutted the car, all interior is in boxes and now ready to do those Quarters, but need to order wheel wells first. I noticed nobody makes trunk extensions. Has anyone tried using a 67+abody one, it states on year one that they will not work, can I Make them work(I can modify them so I guess i could) I just want it to look somewhat orginal not like I just put a flat piece of metal back there to make it work, I want it to at least have the drain holes and look correct.

I'll get pics ASAP