Front- i just drilled 2 holes through that cross support box and fed a bolt through. I bent the front of the seat tracks 90* so the bolts could go through. Then i had to dent the support box  where the seat teacks touched. Finally just drilled new holes in the floor to bolt the rear of the tracks.
Rear- all i did was cut about 4" out of the bottom of the back rest and folded the fabric around. There is a metal support bracket behing the foam which needs cut as well.
The bottoms i cut about 2" off the top. They kind of went up towards the backrest a few inches. I cut that down so its kind of flush with the seat edges.
I will try to get some more pics
Overall, pretty simple/easy

Did the back seat require some work?

Can you show what you did to mount the fronts....
Thanks

I found some nice seat at the junkyard and finally installed them. A lot more room !!

They are from a 99 prelude.

The only problem is that the controls/levers are now on the inside next to ebrake handle instead of next the the door, but i can live with it lol

Mike