Easy tips

# Is it possible to interchange an exhaust manifold?

## Is it possible to interchange an exhaust manifold?

Obviously, these are not all the exhaust manifold interchanges that are possible. Other manifolds will fit with adaptations to the exhaust or the addition of accessory brackets that may be missing from an earlier year manifold.

## Why does the intake manifold not mate with the cylinder head?

This is as a result of the third mating surface for the intake manifold: the block. Put simply, if the cylinder heads have been machined, the intake manifold may actually contact the block before it can mate with the intake surface of the heads. Think of it as being high centred.

How to calculate cylinder head and manifold mismatch?

Since the manifold mating surface of this engine is oriented so that it is regarded as a 10-degree head, the calculation is as follows: 0.015″ x 1.2 = .0180″, the solution being the amount to be removed on the intake side manifold mating surface of both heads.

### What kind of exhaust manifold does a Ford truck have?

Ford Trucks: 1965-’83 300 6-cylinder w/o thermactor emission; 1981-’85 351W both sides interchange; 1980-’85 302 left and right interchange; 1968-’76 360/390 Truck manifolds interchange.

Obviously, these are not all the exhaust manifold interchanges that are possible. Other manifolds will fit with adaptations to the exhaust or the addition of accessory brackets that may be missing from an earlier year manifold.

This is as a result of the third mating surface for the intake manifold: the block. Put simply, if the cylinder heads have been machined, the intake manifold may actually contact the block before it can mate with the intake surface of the heads. Think of it as being high centred.

### Why do GM trucks have intake manifolds in them?

Performance enthusiasts want to show off their engines, and the intake is the centerpiece of the powerplant. But GM did not design any cool factors into its truck intakes, especially when compared to the curvy, flowing car models. The trucks are just plain hideous with the support ribs and accessory bosses.

Are there downsides to using a truck manifold in a car?

The other downside to using truck manifolds in a car is that the fact that they are butt-ugly. Performance enthusiasts want to show off their engines, and the intake is the centerpiece of the powerplant. But GM did not design any cool factors into its truck intakes, especially when compared to the curvy, flowing car models.

Ruth Doyle