| 10x1.25 x 26mm (1" long plus you need to add length for added shim thickness and washers on both sides) 12x1.25 x 70mm (1.75" long plus added thickness for shims and washers) I'd pull the brackets off and take the bolts will you to buy new ones. FYI the 300 Degree kit will accomodate up additional shims up to about 0.70".
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