I am looking for some information on header fitment with Shoenfeld Headers. Are there any guys running these headers that are also running D-Port heads? I read on here a few people running 1-3/4" to get them to seal but I don't want to run into clearance problems with the larger tube. I am running a set of Hooker 1-5/8 now and they clear my Canton Street/Strip oil pan fine and I have deleted the ac box as well. I was hoping someone could let me know before I buy them and have to ship them back because they don't clear.