Hi mate. Heads are a straight swap. Torque setting 52.1-63.7 ft-in. Valve clearances 0.24-0.34mm, ex .29- 0.39mm. if they are out, you'll have to measure the shims under the buckets and work out if they need to be thicker ( to tighten) or be thinner ( to loosen). Hope that helps. Consider using the 230 cams. Profile are suppose to be a little more aggressive. 250 head are suppose to have larger valves, stronger etc. might help a little.
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