Thanks everyone for your input.

I emailed EB and this what he said." Hi!

We can help these little engines but the truth is that they are small and the job is big.

You can keep trying to add more power but the problem of altitude combined with weight/load will always be there

There is little to gain on the intake side, I doubt changing the manifold would even be noticed, I cannot advise that.
Ted."

"The 5VZFE Toyota is proving itself but that is a V-6., still fair economy and good power.
The little 4 cylinders all have the same prob, they are little."
Ted

I'm still thinking about it though.

What results have you had with the supra intakes?
With the cam,head and headers it may make enough of a difference. What about the gearing? Stock used sounds cheaper. What do you think.