I've put together half a dozen engines using the Chinese block, two of them based on the EP package, the rest separately sourced using Westwood L1634 and a couple with Westwood ductile liners, none have given any issues so far, the block is structurally more rigid, but there are some small detailed differences between the new and old blocks, the main one being the crank sensor mounting which is allowed for in the EP kit. There are a small number of improvements one being improved drainage behind the rear crank seal (this is something I do on Rover blocks as a matter of course). You wont go far wrong , but the costs might be a bit rich for some. Oily