BBC rotating Assembly. Scat 9000 cast crank 4.250 stroke std/std ext balanced. Scat 6.385 rods. KB  FORGED floating pistons .40 over (4.290 bore) balanced , came out of my truck, very low miles, skirts have a little scuffing on them, crank might need polishing but not cut. i can have our local crankshaft shop check it out. $650. please call jason,  (619) 654-4027 thanks