The Toyota in line six is NOT a stove bolt...Chevy inlines are stove bolts.PERIOD.!!...The truth be known and lord knows we don't want to say anything bad about Japan ..well ...anyway...GM was building Chevrolets in Manila in the Philippine Islands in the 1930's..When the imperialist thugs took over the place they of course inherited the technology of engine and truck building...They simply took the 216L6 design back to their plants in Japan and copied it for mass production..The bombed out factories the allies found in 1945 proved the point...After the US Army took control of Japan it was decided that the Japanese were to start policing their own to some extent..That called for a "Jeep" type vehicle and since they were already building a Chevy six copy it was best to carry on with that..When Japan started exporting vehicles in the 1950's it included the Toyota built Land Cruiser with Chevy six copy..They never changed the old design much up into the 1970,s or when production stopped..GM did not sell Toyota anything...ever..when it comes to the old inline...If a Land Cruiser ever had a 230-250 style engine it too would be a copy......The Land cruiser engine didn't last all that long..They had tried to use the old babbit rod system with moderate updates......We changed dozens of them over to 292L6's ..Only after completely redoing the terrible designed wheel cylinders. etc..Someone even thinking about installing a Toy in line..( I use the word "Toy" loosely) into a classic Chevy truck is like putting the darn cart in front of the horse...The days of classic American Chevy trucks is long gone...The ones we keep in shape..restore and use should be kept American as much as possible..........................................................The V-8 engine that Rover used for a while was pretty much a copy of the Buick "Nailhead" built between 1953 and 1966...GM never built it from aluminum..That was the limeys brain child idea...There was a rumor for years that GM sold the design to Rover but has never really been documented...Some so called expert authors have said just that but GM has never said yes or no...Another one of those great designs that just fade away... :o