Lowest under mount brackets for seats???

[CJBinder]

First off I have scoured this forum to find any information so here is my story.

I wanted to get better seats for taking my Z to the track. After every session my *** would be sore because I am trying to hold myself in place around the corners.

One issue is I am not a small guy. I am 6'1". I first went with the Corbeau Forza Sport Bucket seats and under mount Corbeau brackets. The issue was I didn't fit well in the seat and with helmet I had to scrunch down to track.

I sold those seats and bought the A4. With these you can't side mount but they recline plus they will shave the base 1". So I had them shave the bases to get as much room as I can. Now if I remember right their site had the Forza Sports with a base height of 3" and the base height of the A4 is 3.5" minus the 1" shaving I was hoping to get at least .5" height difference so I wouldn't hit my head.

Well didn't work.

So for the love of God does anyone know what the lowest brackets are for under mount seats. Any help is much appreciated!