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Fittings
Pontiac V8 Fittings
Start Here — Fittings for Pontiac V8s
Fittings are what turn a length of hose into a fuel or oil system. Every AN connection on a Pontiac V8 is some combination of a hose end on the line, an adapter that gets the AN flare onto a pipe thread, and sometimes a bung or bulkhead welded into a tank. Size them wrong and the line either leaks or will not reach.
Butler organizes fittings by the job they do: hose end fittings sorted by dash size, adapter fittings from AN flare to NPT, fuel cell bulkheads, weld-in bungs, and miscellaneous pieces such as banjo fittings and fuel pressure gauges. Russell and Earl's cover most of what a Pontiac build needs.
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1. The four kinds of fitting on a typical build
Almost every fuel or oil connection on a Pontiac V8 is one of four things. Knowing which one you are looking for is most of the job.
| Hose end fittings | the piece that attaches to the hose itself, in straight, 45 degree and 90 degree. Butler sorts these by dash size so you can shop -6, -8, -10 or -12 directly. |
| Adapter fittings | AN flare to NPT pipe thread. Fuel pumps, regulators, carburetors, fuel blocks and oil galleries are almost all threaded NPT from the factory, so an adapter is what lets an AN line connect to them. |
| Fuel cell bulkheads | a through-the-wall fitting that seals where a line passes into a fuel cell. |
| Weld-in bungs | aluminum fittings welded into a tank, pan, cell or fabricated part to create an AN or NPT port where there was not one. |
2. How to work out what you need
Work the system from one end to the other and write down every threaded port you have to land on. That list becomes your fitting order.
| Start at the ports, not the hose | note the thread at the pump, the regulator, the carburetor inlet and the tank. Those threads dictate the adapters, and the adapters dictate the AN size. |
| Then choose the dash size | the hose end fittings and the hose have to match the AN size your adapters land on. A -6 hose end will not go on a -8 adapter. |
| Pick the angle for clearance | straight ends are the strongest choice when the line has room to sweep; 45 and 90 degree ends exist to keep a line off an exhaust manifold or out from under a drop base air cleaner. |
| Keep the finish consistent | Butler stocks most Russell fittings in black and Endura. Deciding up front saves you a mismatched fitting in the middle of a finished engine bay. |
If you would rather not assemble a fitting list from scratch, look at the hose and fitting kits. Butler builds pump to carburetor kits for common Pontiac combinations that already contain the right ends, adapters and hose.
Not sure what your Pontiac needs?
Call our tech team at 866-762-7527. Tell us your engine, heads, car, and power goal, and we will put the parts together as one combination that works.