1st rebuild was done at a garage costin over 1200 with a genuine new head, but the twat didnt fit me a thermostat, kept same shells when i paid fa new n piston no3 was wrong way grrrrr so 2nd rebuild i got 3 real rst enthuiasts to build n it was done superbly, like brand new inc all hoses n gaskets n a 90 head gasket but never had a amal to fit coz wen i bought her she had a bleedvalve. it was only monday i got a amal valve n a m8 fitted it im gonna swop that this afternoon so its to ecu but u think i bought a dodgy chip??? it cost me 85 notes of ebay???