so i have a question i found a hx40 off of a 8 liter cummins.. it has a 18 housing but i heard that i can find a 16 housing with a t3 from a turbo shops scrapyard for around 100 bucks.. the guy only wants 300 for the hx40 and another hundred for the housing if he finds it. is it better to get this setup or go with the two gds upgrades for about 425 bucks?