Not only is the .26 nasty but it is not a true big block and your ez-start system will still work with it if you wanted to. The Picco is a higher reving engine than the OS.21TM.....with equals more speed fun and broken parts
Picco .26 engines are always good for breaking parts on the Revo. I have a Picco .26 Max in mine and it is always good for pulling wheel stands going from half throttle to full throttle.