Exhaust on lowered Blazer

[72BLAZERDUDE]

Im doing a 4/6 drop on my Blazer and also need to replace the exhaust sys. I have the shorty headers. I want to run the pipes up between the frame rails but I have talked to 3 muffler shops and all 3 gave me grief about doing it. One guy even told me I should reconsider how much I am dropping it, that it is to low for the road if you have to put the exhaust up in the frame. None of them wanted to cut the holes for the exhaust to run through the middle crossmember. Am I asking to much. Do I really need to put it up that high if I am not dropping it with air bags. Does this cause problems with welding it up what about the crossover. Just not sure what way to go.