OK,
your intake, carb & exhaust manifold are really restricting you from making more power.
You would make more power by using a 4 bbl carb about 600 CFM.

A intercooler will make a significant improvement & will allow you to boost much higher than you are currently.

Adding methanol injection is like running race gas & allows for more boost & timing.
The turbo is a T3 made to bolt up to a GN Buick.
That style 3 bolt T3 does not flow as good as a 4 bolt flange T3.

You are using a 350 CFM 2 bbl Holley , correct?

MBHD

[quote=Boucher
I would rather have low/mid power, especially with the low rev 250. I have to shift really quick.

I have the stock intake manifold bored out to the "oval" size of the 2bbl carb.


[/quote]


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