SBC SWAP IN A 64 BARRACUDA?

Maybe the OP is just trying to make something DIFFERENT by using what he has at hand. The only question was about the durability of an 8.75 differential.
Who gives a **** what it is that he does with it. Yes, he did state the plan for his project, which probably half of the responses would have been asking about anyway. Too many purists stating opinions on something that is not their concern. That is what drives people away.