Thanks for your reply,yes I have a air/oil cooler setup,my engine is from a 940 ,I think it was a 1992 engine,my car is a 74O.The n/a head is from a vw lt35 truck not sure the year, it has the combustion cambers as well.Also between the valve seats there are small cracks, is that still ok?So you are saying the turbo head I have would be better than the n/a head for performance,what about changing the camshaft on the heads would that be an idea?
Thanks
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