Mechanical to Hydraulic lifters

I have a healthy 360 motor with a Comp Cams XR274R cam kit.
.564 intake/.570 exhaust mechanical roller.
I don't like the sound of the mechanical lifters.
Can I replace the mechanical lifters with new hydraulic ones? I know I may have to replace my push rods as the length may differ.
Thoughts?

Thoughts...yes, learn to like it...:D

I have the XR286R (the next size up) in my street/strip Barracuda....and it runs mid 10's....what's not to like?