The engine in the car is a 292 out of a '59 Fairlane- the previous owner modified the oil filler cap to allow a fuel pressure gauge to fit.  

I want to get another one- are they all the same for Y blocks?  I just want the stock one.  Any recommendations?

Thanks.  

Many years ago I purchased the reproduction breather cap for T-birds because it has a dense foam filtering media inside similar to what many small engine air filter are made of. By adding one drop of motor oil in each hole helps collect and hold airborn dust.  It gets cleaned in mineral spirits every yeart and reused. The fit on the oil filler tube is very good, like, better than most.  Judging by the dirt that comes out of this cap I'd say it works great and  no need for a closed cap piped to the engine air filter housing.  Just my 2cents............
   



64F100 57FAIRLANE500