I have some 843cc and 817cc engines that I need to do a performance redo. Reverse CW rotation in my 600 and CCW in the 850 car. I have some of the parts. But I have some questions. Has anyone offset bored the 843 block to use the 67.2mm size 965 engine style pistons? The cheap Chinese connecting rod sets on eBay have the floating pin size of 18mm and 110mm length. Are pistons available for the 63.5 stroke. If you put a 903 crank in the 843 block and 843 rods. Do you have get custom pistons made or can you machine the stock piston tops off 2mm? I have a 70mm Giannini crankshaft and stock 843 rods. What can you use for pistons? Can the 850 3-bolt water pump fit and run CW in a 600 car? I had planned with John Edwards to install a special center cam bearing to use a 600 camshaft in the 850 block. Does anyone know of a machine shop doing that kind of stuff these days? Thanks, Kent B.