Not sure what "parts" everyone's mentioning but they're not any tougher to build than an A-body. Yes, if you want all the spoilers and such it can be tough but other than that, there are are mounts, headers, etc for the cars. It's really no different of a build, you just don't have alot of guys to bounce issues off of. Biggest problem I have with them is that I believe the steel used at that time (overseas) for the frame is crap and likes to rot/separate real easy compared to an a-body.