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Boost on the 3.0
The 3.0 can handle boost, and far better then the 3.3 can. Quite a few 3.0's are out there running boost, by most commonly a turbo, but I know of at least two blown setups which are done or almost done. The process is the same as putting the 3.3 under boost, only without the engine work. Basically this should be one of the last mods one should do to the car. It is easier (in my opinion) to add boost to the 3.0 after any TB and manifold, fuel system, etc modifications are made.
The biggest concerns are again fuel and intake air temperature- both of which can be resolved with simple work. Sticking larger injectors in with a fuel pressure regulator works pretty much for the fuel system, intercoolers for the intake, etc.
In terms of blower placement, you're pretty restricted to going between the engine and the firewall- in terms of under the hood placement. Cutting the hood can allow for placing on the manifold, etc. Harv has a nice setup for his blown 3.0 (see the links section).
I have heard talk of someone offering kits for mounting blowers on the 3.0. I have not yet heard anything come of this, but if/when it does, I'll be sure to mention it here.
You may need to change the ignition timing if you want high boost (say 10psi or more) and still run on normal pump gasoline. Without the timing, you need to run higher octane fuels. If you use 87 octane, you may need 93, etc. Water/alcohol injection can help increase octane. Propane is an alternate fuel which runs clean, high octane value (~110)- but reguires sooo much legal work (like extra safety firewalls, etc) that the extra wieght may make it unpractical for the weekend racer.
FYI Harv's blown 3.0 Lebaron uses an Eaton M90 out of a late 80s tbird and gets 14s... a lebaron isnt that far from a AC/AY mass-wise.