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thanks for that f-bird . , the heads have had a mild port and good grind on the valves with he guides taken back a bit, im not looking at going full hog straight out as i want something to do later , i worked out that with my 28" tyre and 4.11 gears it will trap at about 130mph at 6600, just worried about big revs in a 400 ,,,,cheers chris
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