I see Schumacher sells a revised bracket now where it bolts to the side of the block. I have the old style on my dad's road runner. That bracket broke when it was on my cuda (w/ a 600 hp 440), welded it back together and lasted for a while. Put it on my dad's 500 hp 4 speed road runner and it broke again after a few months.
I'm about to call and see if they'll send me the revised bracket.

If I had to do it again, I'd put a solid mount on the driver's side. If it wasn't such a PITA to change w/ the motor in the car I'd do it now. I don't like the looks of any type of strap/chain/cable/etc.