I went through the same thing when my 8.75 grenaded. For my application, the Dana 60 was cheaper than the 9". You can build a complete Dana 60 from a junkyard truck rear that will withstand 1000+ hp for the cost of just a good aftermarket drop in 9" centersection (around $1300).

For that level of power, the only factory Ford part used from a junkyard 9" will be the bare housing (NOT the centersection)...and that will need a backbrace welded onto it.

I was not concerned w/ weight or the fact that 9" parts are available at wal-mart practically. I just wanted something strong and the best bang for my buck at the time.