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76-77 f10 alternator swap


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i  was talking about a swap to a 521 i should have been clearer but it will swap have to get a belt that is two inchs longer cause you have to have it out farther on the top bracket then orig our the fam blades on the it will hit the bracket and the one i bought is 60 amp 

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The 521 and 620 alternators are 29 and 35 amp output and much smaller diameter.


The 50/60 amp alts for cars are larger diameter and on the 620 will rest against the idler arm below it. The 521 is similar to the 620 so this may be a problem on then as well. A tighter belt and it will rest against the lower rad hose inlet. On the 620 it is a very tight fit. I used a 720 block mount and a 280ZX lower water inlet to make it fit the 620.

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