I have a HPI RS4 3 and the engine is toast. I have been looking for another engine that will drop in. Now which out of these 2 do you think would be a better choice. Now please dont sugest other engines as I have enough for one of these 2 money wise. So would the 15107 Nitrostar T3.0 or the Nitrostar T-15 be a better choice as a drop in replacement. I really wanna get my car back on the road but cant decide on which of these two to get. If it matters I got a friend with a bone stock TC3 that I really wanna put in his place. Any help would be appreciated. Thanks!!