5.9 magnum swap

a properly set up 8 1/4 will do just fine with non tubbed tire size. Unless you run slicks you should be fine up to about 400 hp,

You probably better not tell that to a friend of mine with a Demon. He ran deep 11s hangin the hoops with slicks every pass for like 3 seasons and never broke a thing. He only removed the 8.250 when he upgraded the whole car for a stroker.