Basic recipe starters for 318 CID Street cruiser engines.
Carb 600 - 650 cfm carb or a small primary TQ W/electric choke.
Intake - Dual plane intake;
Factory iron 4bbl., Edelbrock Performer or Weiand Action Plus or Stealth.
Dual exhaust, with or without headers @ 2-1/2 inches.
Add an X or H pipe
Cylinder heads, leave stock unless they need work. If so, add larger intake valve @ 1.88 with race prepped valve job. (Added bonus for opening up the heads intake port to match intake manifold)
Camshaft, depends on rear gear and tire size as well as the weight of the car. Tell us that.
What are your rear gears & tire size?
