anybody knows how hard and how much it will cost to do a 5/6 speed conversion?

i currently have a muncie 4sp and want to eliminate all the linkages and convert to hydrualic with a 5/6 speed transmission.....i rather have the 6sp if it dont cost too much, but would settle for a 5sp.....thanks ahead...

 

These guys make a 5/6 speed perfect fit tranny supposedly with no cutting or modifications.
Keisler Engineering

 

thanks...just emailed to see what the cost is gonna be