Maybe Carl can shed some light because I have not played with a MEFI controller in a decade. My 0411 has a Cranking VE table that has RPM and MAP as a reference. A bad MAP on alot of GM stuff can cause hard starts but usually shows up as more of a rough or rich running immediately after startup.
I bought a genuine Bosch T-Map for my marine intake for about $30. Mercruiser and Volvo Penta mark them up about 500%. I will see if I can find the Bosch part number.
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