Many spring manufacturers skip this step
Reference Indicator
Chrysler and Big Block Ford applications is precision machined from 4140 chromemoly steel and finished in black oxide
GM Monza / Vega
has the unfortunate downside of delayed throttle response and subdued acceleration
Edelbrock Performer 2-0 Intake Manifold - Cast Finish Special Offers Many spring manufacturers skip thisDesigned for street 396 502 c. i. d. big block Chevy V8s using general duty oval port cylinder heads. number 2161 is stock replacement street legal part for 396, 402, 427 and 454 V8s with OEM 4 bbl. carb. 2161, Chevy, Chevrolet, Edelbrock, Intake Manifold, Intake, Manifold, Dual Plane, Performer, Satin MANIFOLD Manifold height: A 4. 300", B 5. 400" Carb pad height: 4. 85" Carb recommendations: Stock 4 Bbl use choke rod #9179 if needed, Edelbrock AVS2