I ran the can style mounts on my 58 w/new isolaters from Kanter. I had an old MoPar hot rodder tell me to chain it down also but I dismissed it because I thought with the 45's that the cans sit at it would be impossible for the engine to lift up providing the isolater was good and fully inserted. I noticed that coming off the line under full power the car wasn't going forward enough for all the activity that was under hood and figured it to be the converter, then I fabbed a tight fitting shroud on it. The first time I stood on it I about tore the shroud off. Use a tie down with those can type mounts.