Early A Mustang two front suspension

I’m not worried about the purest. You know every brand of street rod uses those front ends they’re cheap and plentiful you can get them any Width so I was just wondering why I couldn’t put one of those on because it definitely won’t fit with my stock K frame. It would be really easy to just rebuild my 360 and put it back in. But a G3 would be way neater. I already have an A500 in there.