You may be... Best to measure and see.

There are holes in the harness to eyelet clips, you need to put a cotter pin or safety wire them to pass tech pretty much anywhere

 

 

You make a good point, for some reason I thought Sparco provided distance from seat bottom to top of harness hole. Let me measure real quick.
Alright, so I get 26" from seat cushion to where the shoulder hole begins to get smaller, this is about equivalent to where the headrest opening starts on the AP1 seats. You're going to get some squish out of the seat foam, but you also have a HANS on your shoulders so...
Terrible pic, but you get the idea.
https://i.imgur.com/MxZKHQU.jpg

 

 

Balladesport, and yeah, you're right, it would be better if the bar was lower. It's not as high as it looks in that pic, it's still below horizontal

 

Is PCI racing out of business? Their website doesn't exist anymore.

 

PCI Racing – Innovative Racing Designs

 

They are still there. Just got a seat rail with sliders from them. Fantastic quality!

 

If anyone is interested in some PCI rails we are an authorized dealer for PCI, they offer different options in terms of rails/brackets for sliding and fixed rail set ups. We are working with them at the moment to come up with a perfect solution for the pole postion. What's available works great we would just like them to be a pinch lower, we are sure this will also work with some sparco seats as they have similar dimensions. We are also in the works of testing a proper sliding rail with sparco circuit seat, not sure if it'll work but we'll give it a shot.

 

I used PCI adjustable brackets for my Ergo M but modified them for max lowness.