Yea you have to be very elaborate with the three thread 2 valve heads. Anti Seize and 13 FT/LBs and you wont have an issue. I ran 16 psi through the lighting with ported cams 3 thread heads with no issues for 2 years and then the next owner blew the built motor:dumb:
From the original Shelby Cobra, to the Shelby Mopars, and the newer Shelby Stangs this guy was an automotive legend.
http://bizbeatblog.dallasnews.com/archives/2012/05/legendary-racer-car-builder-ca.html
I know certain year F series trucks were expensive to rebuild front ends but I dont recall but if the motor has been maintained then 200k I would worry about. Also stay away from farm trucks..... lots of dust and abuse.
Wife has a Dyson and it works well, but after owning it for 5 years its loosing its suction ( the vacuum not my wife) so we may have to get it looked at. I bought a little hand held Shark for the cars and it works great but the only issue is the battery does not last long.