probably a bit of a pointless question but something i was pondering...
At what point does an engine stop being the original part number,
if you take say a cvh and add..
new cam,modify the head,new inlet and exhaust manifolds,new oversize pistons,new rods ,bearings, machined out block,new crank,new flywheel clutch,gearbox etc etc
surely this is no longer a cvh??
don't ask me what it would be called though.