I made the same switch a few months ago, I like them I can run more pressure and its more stable top end. I ran tubes in my Q.T.P.s I am not with the drag radials. My 60 fts got a little better ( low 1.50s) but I did a gear swap at they same time ( 4.10s to 4.30s) so I don`t know which helped lower the 60 ft. Good Luck with them!