Having built and owned an 834b I can certainly tell you they are not quite as robust as most of us would like. They are of a very early design and not everyone's cup of tea. Saying this though, holding a nice one in your hands is a whole other deal. I had been building mine up to do a little (very light) vintage racing with. Sadly times got tough with my wife having babies and us being down an income so I had to sell it to pay bills.
Damn I miss that car now!