I've got a 3wt older St. Croix Legend that will chunk a size 14 fly all day.
I've got a 13' 7/8 spey rod that will chunk a size 2 articulated 6 inch streamer all day.
Not trying to convert you, but if you're thorwing a 3wt line, why not a 3wt rod?
Small spaces=roll cast...