- 1). Replace the belt-driven cooling fan with an electric fan. This will help free up horsepower and is one of the least expensive upgrades you can undertake. Remove the stock fan, fan clutch and the fan shroud, leaving the pulley on the engine to drive the water pump. Mount the electric fan against the radiator.
- 2). Remove the air cleaner, followed by the old carburetor, and then finally the intake manifold. Replace the intake manifold with a suitable replacement from a company such as Edelbrock or GM performance products.
- 3). Install the new carburetor on the intake manifold using the four bolts which are included with the carburetor. Before installing the air cleaner, attach the fuel line and throttle cable to the carburetor, routing them in the same fashion in which the stock parts were routed.
- 4). Install the air cleaner assembly on the carburetor by tightening down the compression band located on the bottom of the air cleaner onto the mounting lip of the carburetor. Finally, replace the old stock air filter with a high-flow performance air filter.
- 5). Replace the stock exhaust manifold by unbolting it from the engine block, then unbolting or cutting off the exhaust tubes which lead to the exhaust system. Bolt the new exhaust headers into place on the block, using new exhaust gaskets to avoid potential leak issues using old exhaust headers.
- 6). Cut or unbolt the old exhaust system and replace with a larger-diameter tubing fitted with a high-flow muffler. Bolt the exhaust up to the exhaust hangers, routing it over the rear axle, then bolt the exhaust pipes to the headers.