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The reason for a smaller pulley is to have a higher output of amps at idle, the 400amp puts out 180amps at idle, almost what the 200amp puts out at max rpm’s.

it’s already off…so it will stay “off” LOL

May I add, there is a pulley kit that uses a fixed pulley on the 200amp that allows you to use the 400 serp belt, or if you are able to remove your old fixed 400 pulley you can reuse that….but you will lose the lower rpm indication previously talked about because it’s a smaller pulley.

Never a problem, we just had to make sure you had everything, so based on that conversation on the phone I was confident you Just needed to install it all as I’ve done numerous times, it would all fall right into place. And yes….your post install observations are spot on and of course one of the...

im failing to see what the problem is…

So what’s the problem? Drop the 200 in and install the spacer to take up the difference of the shorter mount…

You need the spacer, 200 amp rear support bracket and 200amp rod bolt…The old 400amp rear supprt won’t work. Also remove the extra starter positive cable and extra ground cable that runs to the extra battery box ground stud.