My opinion - depends how you want to do it. If you want a top of the line job from someone that has the experience and not to mention innovative parts - like billet motor mounts that use stock rubber isolators, huge custom 4 wheel brakes, suspension tricks, custom ECUs, manifolds and the list goes on and on.
See Rob at ZcarGarage - check out his blog as well - you will get some ideas of what's happening - he is actually putting together 2 outstanding 240 RBs right now.
Call Rob and tell him that BEHEMOTH's dad told you to call - that's the stroked RB he's building for me.