I just added an extra idler to my setup to see if it would help, and it did. What everyone is saying is true- the spring loaded tension setup is hands down best.. But for just the cost of a new belt and a stock fbody idler, I was able to come up with a way better than stock solution. It may be worth a shot for starters if you don't want to dish out $700+ for an entirely new setup immediately.

https://ls1tech.com/forums/forced-in...rap-fbody.html