"" I installed the 74 jets on the primary. The cruise went up to 13.0-13.5.""
- You are going in the right direction!!

""I went back to 76 jets on the primary. The best I can get the cruise is 12.8-13.2.""
- You took a step backwards. 72 jets may get you in the upper 13's and 70 jets may get you into the low 14's. Keep testing thumbs

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""The "under load" is where the PVCRs come in. They are the power enrichment circuit. Do not use the mains to set that. Continue to pull jet until the cruise gets happy. Then throw more fuel at it when under load with the PVCRs and give it to it sooner with an earlier opening power valve.""

- This is what you want to do after you lean out the main jets to get your cruise A/F where you want it.

1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)