Originally Posted by
Rick_L
A Holley Street Dominator is a low/medium rise dual plane manifold similar to an Edelbrock Performer. They are a good choice for a torque type application. Holley lists it as good for idle-5200 rpm. It would be a step up from the iron manifold without going overboard. I don't have any idea if it will clear the canister.
Using the exhaust as a vacuum source for ventilation isn't going to work on a street engine. There won't be any vacuum at idle and cruise where you will spend most of your driving. This deal only works on a race car with WOT. The oil pan isn't a good spot for the breather, too much chance of sucking oil out. Go with your original deal with the pcv plumbed into the road draft hole.
There are manifolds that will clear the canister but I don't know which ones. Some have a rib that you can remove to make it fit also. A really old aluminum intake that was being made back in the 60s would probably have a better chance of clearing, but no guarantee.