Quote Originally Posted by cffisher View Post
Don't know the expense but I have read about Vett. IRS with 9" Ford center section..
Kind of hi dollar. Not all it's cracked up to be, either. Still have the Vette half shafts and joints. By the time you replace all that with moly half shafts, billet yokes, and 1350 joints it all gets just strong enough to wipe out the bearings in the uprights! Think to get any life expectancy out of an IRS it has to be the newer Vette, 8.8". Both are designed to live behind 500+ horse engines and you know like any other part the OEM's have to warranty they have a bit of extra strength built into the unit over and above what the engine puts out....... Well, I know Ford engineers do it that way anyhow...