Kevin,
Why not just install an AF gage and be certain? 
-Bill
p.s. install it on the passenger's side O2 sensor. As I understand the EG33's fuel rails, cylinder 5 will run lean first, as it it the last cylinder in the fuel path.
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'92 Fully caged, 5 speed, waiting for its fully built EG33
'92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension
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