Tallon, I have updated IKR to reflect the info you provided.
Really? RTR looks like a scam? That is too bad. Is that the consensus around here?
I never noticed that the extreme-sportscars.com was not an LP460 but you are correct! Bummer. So that means, there is only one option for OEM spec LP640 kits and that is Watson who is currently not shipping kits. Looks like I have no choice but to go with CKI. Hopefully that will change by the time I am ready to build. Either that, or someone else will sell their Watson kit when they decide not to complete it.
As for the MR2, if it takes that much to get over 200 HP out of it, I am not interested. I will either use it stock or go with a different drive train. Again, I am in CA and I have to worry about our emissions. I would rather just use a more powerful engine than mess with one that much.