I'm building a sled to run in 700 and 800 improved. I will step into Pro Stock 700 and maybe 800 as well for track time. My question is, do I have to meet the rgulations in Pro Stock to enter that class? Mainly having a sheet of steel fastened to tunnel. Also can I install a smaller fuel tank inside my stock one and still be legal in improved? The wieght in 700 imp is 750 and 775 in 800. Do I add wieght to run 800? Also I.ve heard they might be upping the min. wieght in pro stock to 650. Is that all the classes or just 1000? Thanks, Mark.