You'd be better off building a 2.1 or 2.2 bottom end, and use a gt3071r.

Cossies as standard aren't built for progressive power say like a 20v vw is,
its an old school low comp setup using old school injection.
The yb is all about nothing nothing nothing then bam power.

depending on how much power you want will determine the drivability and torque characteristics with regards to low rpm.