The M715 doesn't have any real problems except maybe the water pump....if you use the truck for what it was designed and intended for. It was not made to be a highway cruiser. It was made for off road and that it does in stock form very well. These trucks can be upgraded and modified just search through this site and you'll find page after page of motor replacements, upgrades to axles etc. But the stock M715 IMHO is going to worth more money in the next 20 years than the modified one. There are parts available for the truck you just need to know where to look and this site gives you a helping hand with that.