[Curby]

OK, I just bought the EZ EFI system for my 1972 Vette. The car has a GM ZZ454 engine with the Hooker Super Comp side pipes and headers. The header collector is outside the frame rails (See attached photos).

The car was quite dirty in these pictures.


I want to put the O2 sensor in the collector.

I have seen guys mount them in the top of the collector, but then I would have to drill and weld the bung on top of my ceramic coated pipes.

I could mount it in the side, but it would be pointing down, and could collect condensate.

What would be wrong with welding the bung in the #7 pipe? I know it would no longer be an average, but isn't #7 one that is typically lean?

Thanks for the help.