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The problem with these cars is going to trying to maintain adequate oil pressure to even support 300+Hp with these FA20's, from what i've seen and read if you aren't in the 60+ PSI range your rod bearings will be the first thing to go out.
Also I would just stay stock compression if you have E85 readily available in your area, if not go with which ever compression your tuner recommends.
Since my tuner recommended me to stay with the stock compression on my built block I just did, since I only run high boost 16+ PSI on E85 and less then 11 PSI on 91 octane.
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