Torque Strap?

I'm doing a Slant 6 to 360 Magnum swap. I'm using the Schumacher motor mounts, trimming the driver's side slant six k-frame mount, drilling a new bolt hole for the Schumacher mount as per instructions. OK, so the instructions also recommend using a torque strap for "...any high performance and/or racing situation...". After cutting/drilling the driver's side mount, there is a thin (3/16" wide?) strip of metal on one side of the new hole for the motor mount bolt. Perhaps they believe this is a weak point. My 360 will have about 370 hp/400+ lb ft of torque. I'm definitely not racing, but does anyone think I need a torque strap for safety reasons. I won't be pushing it hard, but I do like the occasional burnout. What about strengthening this weak point? I'm thinking it's likely fine without a torque strap, it'll be only street use, no racing, but....anyone done this conversion and have any relevant experience?

Brian