440/4 speed install, which method?

i'm doing a 440/auto into a 70 dart from the bottom . i'm also putting a gv od on the trans . is there any floor mods i need to do for clearance of the gv od ? not trying to steel this thread , just lazy about starting my own , lol . i've done it from the top with a 383auto combo , hood on . went okay with the brake booster/master and steering column out of the way .