Depending on how the 318 was rebuilt, as in what pistons and heads as well as the camshaft used or even what type of dual exhaust it has, even if it was dead stock, IMO, the best engine parts to bolt on are;
1; 4bbl. intake, carb & air cleaner….
This is largely your choice in what your bolting on.
Be it a OEM iron intake and TQ or a Holley or Edelbrock RPM intake and carb, this combo is a nice addition for power and mileage if you take the time to tune it well.
2; Headers into a 2-1/2 exhaust
The standard headers (which I really dislike) and a Summit or Jegs exhaust kit is a hard combo to beat for up to 450 hp. It also works great with dead stock engines.
3; Upgraded ignition; in the following order…
Easy - MP a chrome box or a excellent knock off like the Revenator, FBO, etc… or a MSD or equivalent which lays off nice on cruise with the multi spark which translates to better mileage. Open the plug gap to .50-.55.
IMO, it’s super hard to beat the OE distributor once recurved for your car. An aftermarket unit IMO should be similar to the OEM in style and components.
For the street or the moderate strip use, this is a great combo that doesn’t break the bank and performs awesome.
