Advice small block K frame with Schumacher conversion mounts for a big block

pics are great. I will be swing a 440 into my 69 Dart. Did you pick up the engine and trans on the carb plate ? My 440 has alum heads , alum intake ... I am wondering if the engine / trans package is too heavy to pic up with 4 3/8 bolts into alum ? any input ? thanks,