I run TTI's on my Aspen 360 and nice fit with no more burnt wires,easy starter removal/install,and no more tearing the steering linkage apart.Mine are 1 5/8 - 1 3/4 step ups.I also run a Milodon pan with out issues as well.

77 Aspen R/T 60'@1.41 10.76 @ 123.26

http://www.youtube.com/watch?v=Eya3Ue8KoZk