What rubber engine mount is he using on the driver side ? I went thru this with my dart , the replacement mount I got , think it was schumacher , is thinner than the factory mount , I replaced my worn oil soaked original mount that was crushed and sagging badly , I bought the shims that Schumacher sells to level what I have . I think what they were selling was a mount that was not the actual for the application , also their poly ... if I remember right ... is also thinner than stock which is why they have the shims . I scored an NOS original mount that i haven't dared to use as of yet , shimmed the left replacement to get the engine level.