Super Stock frame rails/floor

[Mark Ugrich]

I've been reading this forum for sometime now and finally I've decided to jump in with both feet and convert my 1965 Mustang coupe bracket car into a real race car.
It's easy to see that there's alot of really innovative,intelligent and experienced racers here.I've already learned quite a bit and I'm sure you guys can keep me pointed in the right direction as I work through this project.
My first question relates to rear frame rail height.Can the frame protrude through the floor in the trunk area?I know the rule book says it can't be higher than the stock flooring.Does this mean it has to be under the floor? If anyone is willing to post pictures of what they have done, it would help me decide what approach to take.The last thing I want to do is build the car and get a thumbs down in tech.
Thanks in advance for your help and it's good to be here. Mark