My opinions on AD trk IFS options is discussed on
www.meyerbrosrods.com along w/pics of a 48 GMC & a 57 chevy trk.
For the rear I have settled with using Crysler 5th ave rear springs - hangers & all on the last 3 AD's I have made.
Good luck Don
PS-If you decide on a Must II type I have been happy w/TCI. Their quality & design are as good as the others & they are cheaper if you search the web.