smog failure - is it MSD, is it B&B ?
 

I went to smog my '88 this weekend and blew over the NOx numbers. The HC and CO were in range, here's the results:

speed RPM HC (meas) CO (meas) NO (meas) NO (max)
15mph 1530 92 0.51 1381 807
25mph 1675 84 0.41 1028 746

I had replaced MAF intake with stock equip for test but left MSD unit in because it would be pain to rip out. SmogGuy thinks MSD may be increasing head temp and causing raised NOX levels. I know the MSD does use a bigger coil, and plugs are gapped a little wider.

I also have a B&B dual exhaust on. With this setup, the cats are after the muffler, so I'm wondering if I'm failing because they aren't getting hot enough?

Which leads me to ask, has anyone passed SmogII test with a similar setup, ie MSD unit and B&B exhaust?

Thanks,
jc