1971 351C valve cover help

[Fordguy427]

Good evening,

Im hoping for ideas or suggestions, or even some guidance if any one else has run across this issue.
First off, a picture is worth a thousand words….my car has some cheaply chromed valve covers that make me want to puke every time I open the hood.

So once I finished puking I set about to change it. I really like the OEM Boss 351/302 valve covers, but I dont like the price LOL. So I bought a set of Ansen cast aluminum valve covers….so far so good. The issue is that the Ansen’s dont have a provision for the screw on Autolite cap that holds the PCV valve. Next picture is a set of Ford FE valve covers (painted more of a Pontiac blue? Goddamn hack previous owner) that have the proper size hole with the appropriate folded in metal that provides a “ramp” that the Autolite cap twists into and hits a stop after 1/4 turn. So I need to do 2 things to modify the Ansen valve covers….enlarge the hole to accomodate the Autolite cap, modify the hole so it has two notches to fit the Autolite cap, and somehow get a ramp built into the underside of the valve cover to allow the cap to pull itself tight to the cover. Anybody do this before?

 

[Sheriff41]

Get a grommet and a press in breather cap. You can get the caps with or without a nipple for the breather hose. Check NPD, Kentucky Mustang, or one of the other parts houses for a variety of caps.

 

[Fordguy427]

The valve covers came with the correct grommets, but I would like it to look OEM correct. Thats why I’m attempting to go with the Autolite 1/4 turn cap with the PCV valve going through the center.

 

[Sheriff41]

If you have a piece of material the same thickness as the aluminum on the valve cover, try cutting a hole with the two notches and see how the valve cap twists in without the ramps. You may be able to bend the tabs on the cap so they will hold the cap in place on the flat surface. If it works, cut the notches in the valve cover and run with it. I agree with your choice of valve covers. I run the original Ford aluminum ones on both of my Mustangs.

 

[cjstaci]

Just my two cents, take it to a machine shop and see if they can match the opening for the twist on breather.

 

[Billw69]

I’m not completely sure my Boss has the ramps your talking about, It just has the two tangs on the cap that provide friction on the Valve cover. They are the originals too.

 

[Billw69]

As I think about those ramps…….. I may have mispoken. My car may have them although their cast into the cover.

 

[MOTORCITYBADBOY]

My 2Cents. Get rid of those imposters, and invest in some authentic Boss valve covers if you want to stay with aluminum. There are lots of used Boss covers around that can be acquired for a fair price..