11. Aftermarket Answer
We've already established that the factory cast-iron intake manifold is a formidable performance piece, but the fact that it weighs at least 40 pounds can make it somewhat unattractive to some, while others simply prefer the appearance of a cast-aluminum intake manifold. If that's the case, an Edelbrock Performer is an excellent alternative that, essentially, performs identically to a factory iron unit in most street applications.
Careful hunting through online classified or auction sites can provide a used example like this for less than $100.
12. Quadrajet Quotient
If you've been a faithful HPP reader for any length of time, you've likely noticed that we've dedicated a great number of pages to the Rochester Quadrajet, over the years. This isn't just because it was the most-common carburetor Pontiac installed on its four-barrel applications, it's also due to the fact that it provides excellent performance when correctly modified.
Though the Quadrajet and its associated performance modifications have been extensively covered within recent issues, it's still worth noting that its small primary-barrels provide excellent throttle response and strong low-speed performance, which yields excellent street manners and good economy. Its large secondary barrels allow for strong full-throttle performance.
A Quadrajet installs easily and is compatible with the stock throttle linkage and its associated brackets. It also fits well under a factory Ram Air pan or Trans Am Shaker. Surprisingly, any Pontiac unit from the mid-to-late '70s is an excellent base for performance use-even those from the lowly 301ci are capable of flowing in excess of 800 cfm.
Swap meet or salvage yard finds should set you back no more than $25 for a typical unit. Expect to pay considerably more if you're searching for a specific casting number, however.
13. Spacing For Performance
Your budget might not allow for a high-flow aftermarket dual-plane intake manifold, such as an Edelbrock Performer RPM, but you're wondering if your combination might benefit from it. If so, you might consider installing a simple four-hole carburetor spacer onto the factory cast-iron intake, which serves to increase overall plenum volume and adjacent runner length. Examples like those from Summit Racing (though this particular one is for a square-bore carb) are available from most any local-area speed shop or popular mail-order supplier for less than $30.
If you're really looking to test one on the cheap, you can fashion your own from solid wood. Simply using a carburetor-base gasket as a template, spacers in varying thickness and configurations can be produced for a few bucks. It may sound crude, but it's an affordable and effective way to determine what your particular combination likes, while also isolating the carburetor from engine heat that migrates upward from the intake manifold.
14. Ignition System Simplicity
It's been proven time and again that Delco's original points-type or HEI ignition systems are more than adequate for dedicated street applications, but the HEI gets our vote for its simplicity and low-maintenance operation.
As opposed to purchasing a high-dollar aftermarket unit, scouring through local salvage yards, or swap meets should produce a usable Pontiac HEI (like this) that's in relatively good working order for less than $50. It'll likely only require a thorough cleaning and replacing any of its questionable components with high-quality, stock replacements to again operate as intended. And, after adjusting its centrifugal and vacuum advance curves to match your engine's needs, your low-buck ignition should provide strong performance that can rival anything from the aftermarket on the street.