Hey all so here goes we just picked up an Rcz for the misses to replace her 307 she brought it as a non runner (yes she loves to give me ball ache lol) anyways it appears cylinder 1 has zero compression and from a quick look with the scope it looks like a cracked piston I'm going to pull the engine I'm a reasonably competent mechanic having rebuilt a few golf and vaux turbo engines but I'm wondering if the block from the 156thp is the same as the 200 as it would be easier to swap the head onto a new block rather than reboring it and I cannot seem to find a 200 block but there's loads of 156s anyone rebuilt 1 of these that could give me a few pointers would be much appreciated. Thanks all.