RE: Losi XXL or Revo 3.3????
Just some advice from a person thats been there done that, I can tell you from the cuff, that the lst2/or xxl is going to be the better to tune and maybe less touchy, i have had a 2.5 t-max and still own a 4-tec 2.5 the smaller the block the more time involved in tunning, the larger the block the more room to move, so this in mind the revo is sweet but all truggy, and very able but not as much a basher, and very compact the losi trucks are very user friendly and opened up for maint. just like the diffs and only needing to remove 6 screws to get a diff out.... so likewise you will not need to update the engine if its the 454 like you are looking to change on the revo, run the stock one and get the kick but radio while your at it, only upgrades you may want to do later will be to a 32 and steel spur gears thats about it unless you modify it to 5th scale, have fun finding a revo you can make larger to run with the big boys, its not even realy 8th scale...