You can sell the components to help fund your intake and carb. There's quite a few intakes that work well with the small port 318 heads. The old Edelbrock LD4B is a good choice. They haven't been made for years but do come up for sale occasionally. New or used, any intake will run from $100-$300 A 600 Edelbrock or Holley carb will work well. They go for $100 used to $300 new.