Im currently running a 5lb lower pulley.Is it worth installing a upper pulley?(Need more power Im givving it all shes got)!!And if so what size.Is it a nightmare to install as everyone says?Or do you think I would be pushing my luck possibly breaking parts..Any opinions?Thanks Disregard the sig,I no longer run N20...

 

I have one of the interchangable upper pulleys. Easy to install with the proper tool. If I were to do it again I probably would just go larger on the lower.

 

I installed the interchangeable upper also, and like Silver said if you buy there puller then installation was a snap.

I can also understand wanting to do an upper, your at a 5lb now and if you get much bigger in diameter the pulley will get close to the tranny cooler lines and then you have to move'em.

So an upper kit with puller is a spendy deal but could be worth it if you don't want to move cooling lines out of the way.
Dale