51 chevy mustang ll questions

i have found a stock mustang ll front end is there any difference in the width of it verse all the aftermarket one's out there..........thank's for any help

 

Minor differences in the crossmembers and strut rods. For what you require, go for it.

 

There is a shop there in Dallas that should have your answers. If not I know a great rod builder a little further south. He just put one in a 51 4 door