Ls7 header size help needed

[Later-A-body]

I have my build posted here on Pro-Touring. I have a 1973 Pontiac Grand Am that I performed an LS7 swap on with a T-56 6-speed. The problem is that I do not have enough ground clearance and have made some contact on occasion. I have raised the ride height, but I still need more room. I will need to replace these headers with a new set that provides more room. I would rather stay with a long tube if possible, but it might come down to a mid-length version. A lot of mid-length headers are 1-3/4" and I feel that might be too small on an LS7. The engine is 430 cubic inches. It has Brodix BR7 LS7 heads with 265 cc intake runners, a Comp Cam custom hydraulic roller with 630/640 lift, 226/242 duration at .050 on a 115 LSA advanced 3 degrees. The headers are Hedman 1-7/8" long tubes with a 3" collector and 3" cats, running into a 3" Dr. Gas X pipe with 2.5" Borla mufflers and tail pipes. This combination has produced 482 RWHP, AND 484 RWTQ. The car is incredibly fast, and has a HUGE flat torque curve. I'm looking for feedback from members on this. I don't want to wind up losing power on my set up. Thanks.