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Discussion Starter #1
recently my brother give me a 84 mustang coupe black with a moter he built 8 years ago its been on egine stand i oiled everthing back up primed oil pump and put in car waiting on ignition box and coil now its a 79 302 bored .060 over with what he called 289 closed chamber heads flat top pistons 3 angle valve grind edlebrock perfomer intake 650 holley double pumper carb 1-5/8 long tube headers 2.5" x bbk x pipes he thinks 280 comp cam other misc things too maybe worried about to much compression for 93 octane
 

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If your question is can you run 93 octane with that engine, yes you should be able to. Just get the timing advance right and you shouldn't have a problem. Just hope it doesn't run hot due to that .060 overbore.
 
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