Search function is your friend ... there have been many topics discussed about shocks on our fivers. To sum them all up ... the severe stock angle of shocks on most any tow-able RV makes the shock pretty useless. Unless you find a place to weld custom brackets on that straighten them up which also requires a very short shock ... you're spinning your wheels.
Here's just one shock discussion
http://www.montanaowners.com/forums/...ighlight=shock