Hey Mike, my hope is that it will have the 8.72/6.40 ratios that the GM Heritage specs call out. The donor is a '56 6000 series Chevrolet with the corporate rear end, vacuum shift. I have measured and compared the bolt pattern on the pig and it is the same as mine so I'm hoping it will be plug-n-play. We have been waiting for the weather to cooperate so I can power wash the axle housing and pig before I remove it, I want to keep it as clean as possible so no grit gets into either unit. I'll take one of my axle shafts and compare it to the doner, if that matches then I'll move forward with removing the donor pig.
Axle housings should be the same...if you want to discuss further, start a new thread so we don't hijack this one.
Mike B
