If you have a manuel valve body in your trans, you can put your car in 3rd or high gear and stall your converter usually you can hold your car to 90% of your total stall because of the gearing difference. The difference between the rpm you can stall in first gear and your total stall is what is considered your flash stall. As for a four link, I dont think they hit any harder than a ladder bar, they do give you more adjustment and mostly allow you to take out how hard your car hits. A footbrake car seems to transfer weight alittle slower so your car need to transfer weight easier than a transbrake car. Your car will probably leave better with a transbrake for that reason.JMO