Torque Strap?

A very simple tq strap: get some chain from a hardware store, with the links large enough for a 3/8" bolt to pass through. One end should be bolted high-ish up on the engine. Other end to frame. Get some plastic tube/hose to fit over the hose to keep it positioned & stop any rattling.
I broke several mounts on my van with a 340. I also installed a chain and it solved the problem. Driver side only needed as its the torque side.