Cylinder head must have 3/8 threaded hole same as water pump bolt thread Depending on thickness of water pump base the spacers may need trimmed to fit certain applications shown with part# E-5927-Pelectric water pump and AC Delco alternator part #335-1093 Fits Chevy alternators with 6. 56 inch center to center bolt holes.

ICT Billet BBC Alternator Bracket Adjustable Electric Water Pump Low Mount Big Block Chevy Long Kit 551449
$39.77