Designed and calibrated for small cubic-inch engines such as 305 c.i.d and smaller Chevrolet; 302 c.i.d. and smaller Ford and dual-quad applications such as our new RPM Dual-Quad Air-Gap, Edelbrock C-26, F-28 and Street Tunnel Ram. For single carb applications, match with an Edelbrock Performer or Performer EPS manifold or other brands of similar design. Includes both timed and full vacuum ports for ignition advance. #1801/#1802 are calibrated for single-quad applications and factory equipped with: Metering Jets - Primary .086, Secondary .095, Primary Rod .065 x .052, orange spring (5" Hg). #1803/#1804 is calibrated for dual-quad applications and factory equipped with: Metering Jets - Primary .086, Secondary .077; Metering Rods - .065 x .057; #1804 includes Primary .086, Secondary .077; Metering Rods - .065 x .052; Step-Up Spring - orange (5" Hg). Use Carb Studs #8008 or #8024 if needed.
