Here is a inside look at my thought process on the 2 items you have listed here.
First lets take the intake manifold, I would ask myself a few questions like why do I want to reduce the vibration absorption between my carb and Engine, I asked this long ago and its never answered, not a big deal I have answered this question myself, I have seen these intakes on sled engines their engines vibrate less and have softer
Engine mounts, vibration isolation between the Engine and carb is important to reduce fuel frothing and upsetting the float.
I was told that manifold was made because a stock 350 manifold wont accept a 39mm carb so I took a old hard 350 manifold Hare gave me and proved him wrong so his wording was changed to it makes it easier to install a bigger carb.
http://pilotodyssey.com/39mm350.htm maybe it is but as mention before it reduces isolation.
Why would I pay 100 bux for a manifold that does not match the reed cage? I can buy a new intake manifold from Honda that was engineered for my Engine for 25 bux ( part number 16210-VM0-000 INSULATOR, CARB $ 24.64 at service Honda)
If I am going to buy a new intake for 100 bux it will be matched perfectly to the reed cage I am going to use it wont require 'blending' before I use it.
Are you looking for something that does fit a bigger carb easier maybe one of these will fit a 350 too?
http://pilotodyssey.com/BTmanifold.htm Part number 16221-430-000 INSULATOR, CARB $52.61 at Service Honda.
I am not sold with the Vforce since day one, early on they were the latest buzz word and all the kids hyped them up all over the web, I have seen too many problems and the reeds are very short lived, carbon fiber does not maintain its tension as long as fiber glass, I know several Engine builders that have gone away from CF and back to fiberglass because of this, its not well known or often advertised simply because they build engines that are used in competition races like GNCC and AMA events, they don't really want the average Joe to know what really works.
http://pilotodyssey.com/Vforce.htm http://pilotodyssey.com/cagemod.htm
I have only seen implied performance data nothing rock solid, no simple easy to understand no BS test that shows they are what they claim.
All my research on reed cages over the years has taught me that going from the worse reed cage to the best reed cage at best is about 3hp on a Engine like used in a Pilot or Odyssey, 3hp quoted gains I have found are always on a multi cylinder Engine also so divide the HP gains by 2 or 3, if you get a solid 3hp gain on your 12k RPM shifter go cart and your racing then by all means you better buy one, but IMO to shell out 150+ bux? for a reed cage for the occasional weekend romp is just a big waste of money, someone looking for scant gains a V force will provide is for the guy that changes his jetting 3-4 times a day as the days weather conditions change (temp and humidity) I think the money would be
better spent on spare parts or mods that give the biggest bang for the buck like a drive or driven clutch.
If your spare parts box is full and you have money to burn and you want to buy a Vforce please ensure the one your buying was design setup and tuned for your application, call and talk to Moto Tassinari yourself don't take a vendors word for anything, I say this because years ago someone contacted me from Moto Tassinari and told me the reed cage I posted failure pics of was not for a Pilot or Odyssey it was for a motorcycle implying the problems were caused by using the wrong application.