socal,
I paid my vipertech $400 for the install. and i could have done it myself!
(let him do it because he has better tools)
The r/t if much much different then the gts.
the seats do NOT have to come out and the templete will NOT work.
The only surprise is that the "bolts" that hold the shoulder harnesses in the gts are in the open behind the bulkhead.
On the R/T they have to be found. You have to drill ( we used a hole saw bit) at the dimple marks through the fiberglass to find the bolts.
Also by not removing the seats time can be faster on install.
You just take out all the screws holding the bulkhead move it out and do your work; also this makes cutting your bulkhead for the strapes easier just line them up.
Hardest part is cutting your bulkhead with nice straight slots .
good luck hope this helps
JIM