Seat Holes?
 

OK-

The factory seats in my 88 mustang (I believe this is a design thing) have a lower lumbar "hole" that really hurts after a long period sitting.

Is there a "replacement" cushion that will add lumbar support to the bucket seats?

are you talking about the LX low back bucket seats? Yes....those are very uncomfortable seats. The hole in the lumbar area is normal in those seats and the only thing i can think of is to buy a back support pillow or something that you can sit on for extra support. I've always hated those seats. Having soft seat covers (sheep skin) helps soften and fill that area, but i'd highly recommend getting better seats, like GT/5.0L LX seats.

Are there any other recommendations for replacement seats for the 88 ponies? I'll look into the GT replacments for my current LX low back POS'