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Airbox pop-off valve on '74 2.7

Posted: Mon Jun 20, 2016 8:29 pm
by AndrewSlater
I had purchased a pop-off valve to modify my airbox on my 1974 2.7 engine.

I now realise that my airbox has at some point been updated to include the metal piping from the cold start valve to the inlets.

Does this mean I don't need to retrofit the pop-off valve or do people fit them in addition?

As always any guidance is much appreciated.
Thanks Andrew

Re: Airbox pop-off valve on '74 2.7

Posted: Tue Jun 21, 2016 6:40 pm
by greggearhead
I'd install it. No matter what, any lean backfire can pop/crack the box. I'd rather have the peace of mind.