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    1. #19
      Join Date
      Jun 2006
      Location
      Katy,TX
      Posts
      1,678
      One thing to remember about an IRS is when you start adding a lot of power things start breaking . Half shafts which generally also have extra U joints to spit besides the ones in the driveshaft. How stout are the axle shafts coming out of the center pumpkin to the half shafts? How stout is the posi in it?

      Many of the older Vette guys use a modifiedd pumnpkin to take a 12 bolt posi vs the10 bolt set up as well as upgrading to larger half shafts. One guy is making a 9" pumkin to be used in the 04-06 GTOs making a lot of HP(that already have billet half shafts).

      1978 Black Trans Am 455 Edelbrock heads [email protected] through mufflers on pump gas
      1981 Trans Am 400 stock type motor
      79 Camaro getting a 500" 695 hp IA2 Pontiac motor
      1965 GTO project car
      470ci/Chevy dual quad 409 604 HP 64 Impala SS project
      2004 Pulse Red GTO





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