6.4/8hp70 project 67 Barracuda

ch1ll said
I would not put 870 hp to an 8 3/4.

I don’t think a stock 6.4 does 870 hp, I think perhaps you misread my post, I’m using the 6.4 and 8hp70 transmission.
I haven’t decided what rear end im using, I have the 8-3/4, but might not use it.