Hi Troy
My PCV valve is also plumbed into the carb base. On the right side (yellow arrow).
The other breather, in rear, is plumbed onto the air filter.
View attachment 1715907342
Yes, if you can post the '71 diagram of the power brake assembly, it would be fine. :thankyou:
After some researches, I found that '68/70 Mustangs and Cougars has the same Midland brake booster. So, I took the risk to order a dual-port check valve for this booster.
It's a very low depense (less than $20.00 including the grommet and shipping)
Francois