Few pictures of my 78 with Corbeau FX1 Pro's installed.
I had to section the tunnel on the DS, and clearance with a BFH on the pass side.
I (heavily) modified some 4th gen F body sliders for the drivers seat, to get some adjustability. I played around with it and mounted it with 15* of layback.
A little cozy, but not terrible.
Passengers seat outer brackets. I used some pre-cut brackets from speedwaymotors.com and trimmed them to fit. PN 917-20381
For these, I plated the floor with 1/8" plate, and thru bolted.
For the inners on the pass side I plated the tunnel and used one speedway bracket (rear) and 2 pieces of 1/8" x 2" angle iron (front)
A little tough to see, but I took my e brake handle off, and trimmed the horizontal portion because it would have worn out the seat. I also removed the e brake light switch, but have yet to put the cover back over the tunnel hole.
Here is how much room there is from the shoulder bolster to door cards. Doors don't hit them at all!
The seats sit directly over the new frame rails I installed, and are possibly a little to the inboard of the car off center in the "tub". Still very comfortable to reach all controls.
Given the size of the FX1 Pro's that you have, do you think the NRG FRP 310's or 300E's might fit in a 1977 280z? Of course with tunnel bashing and whatnot.
For comparison, the FX1's are 23 inches at the shoulder bolsters, and have a 20 inch base. The 310's are 24 inches at the shoulders and 20 inches at the base. The 300E's are 23.25 inches at the shoulders and 21.5 inches at the base. I ask because you said the fit was cozy, and there wasn't much room between the seat and your door, along with the e-brake being snug. Essentially, was there anything you could have done to squeeze out a little more room?
If anyone else has some insight, feel free to share.
Edited by NagaSadow, 16 April 2016 - 12:31 AM.