I think I still have a galvy set of bolt on mounts like that. On my Marsland chassis, I ordered it without the frame side engine mounts welded on. They sent me a chassis without the engine mount brackets welded on but also threw in a set of V8 chassis side mounts that could be bolted on in a number of configurations. None of which were useful for my 4BD1T. Yours if you want them (and if I can find them).
1970 SIIA 88, Sold