Lots of good suggestions here...

First as Cab mentioned moving the seat as far rearward, and to the center will help with weight distribution. It also keeps you as far away from the door as possible, which is a good thing in case of a side impact.

Also, as Mr. P-body mentioned, the back angle of the seat has a lot to do with comfort. A lot of guys just slap it on the floor and call it good, but tilting the whole seat back will do a lot for comfort. Shoot between 21 and 23 degree's on the back angle and you should be good. That should put the cushion in the 10~15 degree spot (depending on how the seat was designed.)

Also, a lot of questions always come up about mounting the seat to the floor. This is a place where a lot of guys go over kill. If you think about the loads the seat see's during a crash they are really low. Your body weight really doesn't influence the seat during a frontal crash, because the seat is behind your body weight. Basically the seat attachment see's no more load with you in the seat, as it did without.

The factory to this day still just uses 4 attachment bolts to the floor. And most of the new seats have lap belts that attach to the seat itself not the floor. In a race car like ours, the seat belts go to the floor, we still have 4 attachment bolts, and you also attach the seat to the main hoop cross brace.

Just my