I personally don't like pulling the motor out more times than I have to. Did you do a compression test first? if your rings/valves are bad then any mods are pointless. Assuming your bearings/rings/valves are good, then you want to do whatever mods must be done while the engine is out. Installing a Walbro, going e85 lines, etc can be done later. I went 740cc injectors then changed my mind. Not sure they can supply enough e85 for a fully built Z. Replacing parts and dynotuning over and over again cost $$$.
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