What do you guys do for the submarine strap? How strong does that bracket need to be? Wolfecraft makes something but I'm not paying $70 for two of them. Any pictures?

I'm open to making something.

I drilled a hole in the floor for an eye bolt to pass through and backed it with the included large washer. I also had to put a stack of washers on the inside of the car to move the eye part of the bolt high enough to clear the carpet since the hole was drilled in the lower section of a rib. I used it to make sure the belt was in the right spot, but haven't used it since.

...yup....but no carpet...all the racer supply houses should be able to supply the eye bolt, nut and washers for under $10...