I am pretty sure any geometry differences would be very subtle for a threewheeler, but there probably aren't any.
http://reversetrike.comYou would have to build one and experiment, that's the real fun.
I would build an unequal length A arm setup with anti dive and camber gain considerations.
Ackerman will need to be right, and minimize bump steer < (spend lots of time on this, most important)
Not sure how to determine the rear roll center, but the front R/C would need to complement that.
Use as long springs as practical and add a fairly stiff anti-roll bar.
A lot of this is fine points, most important is Ackerman and bump steer.
Get those right and allow for caster adjustment so you can twiddle the self centering / steering effort.
I would start by matching castor to the KPI and back off if needed