the stock mustang II stuff is junk know way in hell are you going to tell me they are cheap to build all the stuff on the gm sub is for a chevy bolt patterns on the hub big brakes a real upper alower a arm front end not some lower bar and a pices of tin trying to hold the front end from jumping all over the road. the sub is a cheap way out and is heavy if you use the mutang II and the nice a arm kit and the rigth rotors this will be cheap? both front ends will need front end parts? and so if you put the big block in it and try to find some small crapy small tube headers the sub is still good way out for some one who knows how to cut and weld and not to hard but if this is some thing you do not thing you can do it then buy the mustang II kit BUT if you think it is a better front end in stock from it is not .yes the mustang maybe for you if building show truck, sub may not be it for you. but i have have to had to go back over a screwed up mustang II front end on a 55 pickup and my 50chevy will out handle a stock mustangII front end any day