I haven't had any problems burning clutch cables with my MAC 1-5/8", I had mine ceramic coated to make them last longer and look better. You do have to extend the o2 harness but I though every long tube had this issue
just buy the kit from Interactive Tech to extend them. If you have a Lakewood or other SFI approved bellhousing you will have to notch out the passenger side flange to fit the tube through, I didn't have to take my steering shaft out but I did have to unbolt both motor mounts to install them, all my smog stuff fit fine as well but since I am in a state that doesn't require emissions it's all off now
I would like to upgrade to the Bassani step headers 1-3/4"-1-5/8" they are really nice
but are expensive $400.00+
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My Ride Check Out My Site 91GT, Holley SysteMAX II Kit-Heads 2.02" x 1.60",Full MAC exhaust 1-5/8" Long tubes, 2-1/2" O.R H-Pipe, 2 1/2" cat back, 12" K&N Filter, RNH PERFORMANCE Ram Air, Ron Davis Radiator, Full Suspension,3:73's, Welds, Best on new motor-12.60 @ 108, no traction 1.98