Stock suspension racers

Ok so definately a no on the 7 1/4 which I figured. But I don't have the stock seats so my interpretation of the rules is that to run even just a plastic racing seat it needs bracing in the back with at least one bolt. Which I am assuming it has to be mounted to the frame/floor which leads me to believe that I need at least a main hoop. Any other options there?
I have a c body 8 3/4 and axles at home in storage and 742 and 489 cases both with 3.23s just don't have means of narrowing it without sending off to be done and paying for it unless you guys got ideas on how to narrow it at work.

How do you guys feel about the caltrac "slapper" bars on stock 318 springs? Worth the time to make or just stick to a snubber?