Seat Mount in Second Gen Firebird Classic Gas Coupe

[dickj]

I have a question about seat mounting.  I have not yet run this car at Bonneville.  The roll cage should meet the requirements OK.  The seat, the lap belts, and the submarine belt are currently bolted to the floor and not to the cage.  I want to correct that deficiency and mount the seat and all of the harness entirely to the cage but am in a quandry as to how to do it.  There is not enough room between the door sill and the transmission/drive shaft tunnel to construct seat and belt supports out of 1 5/8" tube and still have enough room for the seat.  Can I build a "basket" for the seat out of 1" tube and weld it to the cage, or will that then be considered part of the cage and made out of under-sized tubing?   DickJ

[thundersalt]

The way I interpreted the rule book is as long as the basic cage is built to rule book specs, anything added after that can be anything you chose (sensibly). Your plane sounds good to me, but what do I know

[wilcox garage]

In my roadster the seat mounting was very tight . The seat belts were bolted to 1/4 plate that was welded to 1" tube that ran between the cage and drivesaft loop ( also 1" ) . Just make sure ware the seatbelt runs that it is unobstructed between mounting point and the driver.The SCTA rule book states seat belts must be securely fastened to the frame, cross member or reinforced mounting points so fittings are in direct line with the direction of pull. While going through tech with a new car the inspector noted that my belts were hitting my seat in between the mounting point and my waist. So we had to trim my Kirkey seat to get it right.

[Stainless1]

DJ, call the tech guy for your class or send a question to the scta online.  I would say your plan should work but it is better to get it from the officials in writing...