I don't think you can mix up 351 to 86-93 5.0 WP, fan, pulley as they have different bolt spacing on the WP.
Mark 8 Fans flow huge amounts of air. 93-96 flow more than the other years. I've read 5000 Cfm or something like that. Also that they draw up to 100 amp on start up and a constant 30 amp. So they put a good draw on the batt/alt.
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