single s475 w/t bd diesel divider valve

i was trying to git to insite on wat t4 housing would be the best for my Application and buying a manifold or build a Equal length header ? i have a s475 wt a t-6 and wanting to switch to a t4 wt bd diesel divider valve for my dd and i well tow a mud truck so about 10k and i was going to use MG diesel 7x14 injectors