Ron,
Your fix should last from now on but here is what I do on inline engines with a three point mount ( the front mount may have two bolts but it is still a one point mount). I weld ears onto the heavy plate behind the timing cover and then use flat head Ford mount cushions. This changes the set up from an easy to tip triangle to a stable rectangle. Has to be done during the building stage so not practical on a completed project. You can see the spread ears and mount cushion beneath alternator. I know yours are rear mounts but with spread front mounts both will last indefinitely.

[img]https://i.postimg.cc/CZhbkfb6/Straight-8-a-c-mount-002.jpg[/img]

Last edited by coilover; 11/09/2021 2:00 PM.

Evan