I'm sure it was a-31, maybe we swapped it in the end,
my old saff was on the same package at 36psi on a T34.48 and I ran a -31 on that with no problems at all.

Don't get me wrong you can use a -34 but its not at all common that its needed, especially to reach 25-26psi of boost

A -31 and one of these http://shop.motorsport-developments....alve-294-p.asp is ample of over 32psi
We do loads of them and they just work.