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There were no GZE engines in 86, those didn't come out until 88 in the states and maybe a year earlier overseas so of it's the stock 86 engine it is not a GZE. The GZE block has a boss for a knock sensor on the upper edge of the block between the #3 and #4 cylinders on the intake side and the pistons have a concave top and not a dome or raised area. A stock but well built AGE can and will make 150 hp with about 6-7psi with proper fueling and timing control. But yes, a stock GZE engine will be much more reliable under boost but just like the AGE will require proper tuning.
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