Will a tremec tko or a zf fit my 83 f100 w/o serious mod?

will a tremec tko or a zf fit my 83 f100 w/o serious mod? Put a 460 in it now i'm wanting a 5 or 6speed behind it. i dont want to be cutting into the floor other than for the shifter. moving crossmemers is fine just dont want to be hacking and adjusting the hump, i know the zf was in the 87+ but idk if floor pan design changed any help?