Period Correct PCV and Breather Placement on 440

RR Fan Dan · May 6, 2025

What is the period correct placement for the PCV and breather on the valve covers for a 440 in a 74 RR? PCV drivers side back towards firewall? Breather passengers side front towards radiator? Currently it is opposite of what I described above. PCV is passengers side rear and breather is drivers side front. I am installing a dual snorkel air cleaner and want it to be correct. The air cleaner is a 71 or 72 with the breather connection in the back angled towards passenger side.

RR Fan Dan · May 6, 2025

So nobody knows the answer? I thought this would be an easy question?

qkcuda · May 6, 2025

These grungy valve covers came off my 73 400. I believe this is the correct orientation based upon the filler cap being at the front of the engine. That puts the PCV at the driver's side rear. Also note the wire looms which typically run on the passenger side.

RR Fan Dan · May 6, 2025

qkcuda said:
These grungy valve covers came off my 73 400. I believe this is the correct orientation based upon the filler cap being at the front of the engine. That puts the PCV at the driver's side rear. Also note the wire looms which typically run on the passenger side.

View attachment 1848044

That’s what I was thinking too, but I wanted verification.

qkcuda · May 6, 2025

Here is the engine fresh off the truck.

T2R9 · May 6, 2025

PCV drivers side rear. Breather passenger side rear.

Period Correct PCV and Breather Placement on 440

RR Fan Dan

If it ain’t broke, fix it till it is.

RR Fan Dan

If it ain’t broke, fix it till it is.

qkcuda

FBBO Gold Member

RR Fan Dan

If it ain’t broke, fix it till it is.

qkcuda

FBBO Gold Member

T2R9

FBBO Gold Member

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