8.5 open $500. I would be replacing my 7.5. Wondering about how much I would have in it to be back to a 3.73 Posi in the 8.5. Almost exclusively a street car may make it to the strip once in awhile. 461 not stock but mild 4 speed Muncie. Also a 7.5 3.73 drum to drum worth about $250 ??