I just added PS to the 80's 318 in a 65 Dart. There's a triangular bracket & the flat end w 2 holes, bolts to the 2 water pump/block holes on (1) the dr bottom and (2) the next wp hole right above it and the other end of the triangle bracket w 1 hole takes a bolt to support the PS pump assy. A 3rd bolt goes thru the long belt tension adjusting slot in the PS assy & goes into the wp/block at about 3 o'clock. EDIT use the right length bolts exp on the dr side as one too long can (& has) hit/cracked the #1 cyl wall (it's further forward). If you're mixing/matching bolts you want to have at least 1.25 times the bolt dia amt of actual thread engagement into the block threads themselves (plus a bit more, depends on the app) & you're set.