As durable as a T-Maxx can be, but you'll get badly scratched up plastic skid plates in a week or two of races and I'm not sure how good the diffs are, they're a bit loose by default. Worth a shot to grab one for $200 at least for bashing and mod projects. I looked at my buggy's Hyper .21 8P engine and looked at the stock .15 engine mount (positioned further back than Traxxas' mount) and looks like with little mod it can fit a .21 engine in it but I haven't bothered since I stuck in my .21 and won't take it out for a whlie.
Oh forgot to mention on a side note, DO NOT DO BUSINESS with technicala on ebay, he may have a good reputition but his attitude stinks and sucks to do business with especially when ordering parts. He didn't package the Magic Wheel properly and UPS crushed it so I got a cracked body and battery box and his response was "that's what UPS insurance is for right?" when UPS says they won't do anything about it up here in Canada. He also accidentally mailed some parts for a different car to me by mistake when he meant to mail it to someone else and bitched about it in email when he should've simply apologized.