These brackets are for low hood clearance-Vettes, Camaros, etc. Alan Grove Componets brackets 132R and 232L work great on most vehicles with a wide engine compartment - Trucks, 50 - 60's cars, etc. These brackets bolt to the head and top water pump bolt holes. The alternator bracket will fit all 1969 and newer heads. The A.C. Compressor bracket fits all G.M. aluminum heads including the fast-burn aluminum heads and may be used on 1969 thru 1986 cast iron heads by drilling and tapping one hole for the upper mounting point.
Also available are Low Profile brackets designed for 1987 and later cast iron heads 133R and 232L including the popular VORTEC heads. VORTEC heads use 5/16" intake bolts that point straight down.