springs aren't hard.. just time consuming with all the cranking over the engine so you don't drop valves in. Start with getting the right rockers on there, then you can go from there. THat's at least a fairly quick job and not too expensive. Once you're back to 1.6's then another dyno run will tell us if we've fixed the float or just made the intake restriction more obvious. Have you considered a trick flow or BBK intake?
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