I know a guy who's unlces cousins brothers sisters wifes son has a twin turbo 6.5 and lets just say he has never lost a sled pull. He once pulled the sled all the way home, the sled rental place called the cops they though he stole the sled. when the cops caught up to them they were in the backyard havin a cook out, turn bubba Joe just forgot the sled was back there and drove home like normal. He wsa banned from the race track last time he ran the 1/4 he ran a 23.73 it was the tracks fault though, it couldn't hold all the power and it actually cracked the concrete launch area and put ruts in the asphault all the way down the track.
He welded the heads to the block and has never had HG issue, has twin standyne rotarary pumps turned all the way up, and he put an NV4500 behind his turbo 400. During the week he pulls a converted 53' land all and halls a D9 Cat from site to site, passing semi's all the way.