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Message: <blockquote data-quote="TTSaleen" data-source="post: 1508942" data-attributes="member: 16025">OK.  As others have also suggested, it would be wise to get a good dyno tune to see just what the car needs/wants for timing and air/fuel delivery.To check the true fuel pressure, pull the vacuum line off (and plug the vacuum side with your finger) and with the car running see what the fuel pressure is reading.  You should see this anywhere between 38-42 pounds without vacuum as a normal range.  With vacuum reconnected it is completely normal for this to drop below that range.  Give that a try and see if that at least helps lean it out some as I think it might be getting too much fuel pressure.Also check the timing with a good timing light and ensure your marks are good to see.  I have used white marking such as "white out" correction as something that stands out when using a timing light.Set base timing with your spout connector removed and you need at least 10 degrees base timing, but with any mods I would go 12-14 range unless it starts to detonate then back it off a degree or so.  Make sure to plug your spout connector back in!Just these 2 things alone can make a huge difference on those cars!Ryan</blockquote>