Does the pinto engine have to have a breather going from the rocker cover or oil filler cap to anywhere?

Ideal place would be to your air box but i bet you re not using an air box ae you...so to a catch tank that has vents in it,

No.

Well, neither of mine have.

There is wire mesh inside mine and the manual says to clean it with paraffin.There's a vent valve on the oil seperator but that connects to the manifold.

yours, Pete.

surely the fact that the oil runs out one end into the crank case that is adequate for the air to circulate as well ? i had thought about the boxes as I am unsure on how 45's fit under an MK bonnet. such as boxes that Ca.. do but at a fraction of the cost check out http://www.plays-kool.co.uk/ download brochure and enjoy unless anyone else has another suggestion/ supplier?