Edelbrock Part # 7520 Air-Gap Dual-Quad-O intake manifold is designed for street 396-502 c.i.d. Chevy V8's with 1975 & earlier oval port heads. This intake stands 7/8" taller than the low-profile C-66-O dual-quad intake and offer performance improvements in the 1500-6500 rpm range. The large runners feature our unique Air-Gap design that separates the runners from the hot engine valley for a cooler, denser charge.
Center Maximum Height 5.190 in
CNC Ported No
Front Maximum Height 4.810 in
Rear Maximum Height 5.560 in
Single Or Dual Plane Type Dual Plane
Neither H.E.I. or mechanical tach drive distributors will fit
Recommended intake gasket: Edelbrock # 7203.
Manifold height: A-4.81", B-5.56"
Carb pad height: 5.19"
Carb recommendations: Edelbrock AVS2 Series # 1903 and # 1904, 500 cfm.
Port exit dimensions: 1.60" x 1.93"
Use RTV sealant to properly seal end seals, such as Edelbrock High Temp Silicone sealant # 1076, DO NOT USE END SEALS GASKETS.
Hardened washers Must be used with intake bolts to ensure proper torque and prevent galling of the aluminum.