Hi mate, i had the same probs with vxl..... they told me no that there is no porblems with this engine :roll: Where in the noth west are you? Im in Manchester, anyway a guy on here called Benny has done a few members chains for them for around £220 iirc, however he based near Birmingham but it still might be cost efective to travel to him depending on where you are. He uses full GM parts!