What we researched for this specific generation: where an enclosure actually fits, what the factory speakers are, how the factory audio is wired, and which real builds and commercial products exist for it. Confidence badges say how well each figure is sourced — this is research, not manufacturer spec.
Body styles covered: Hardtop (2-Door Coupe), Fastback, Convertible
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | trunk |
|---|---|
| Outer bounding box | Not independently measured — the real dual-10" ported build (above) is the best available reference point. |
| Known obstructions | None specifically documented |
| Usable volume estimate | 2.4 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x10" sealed, single chamber |
|---|---|
| Box type | sealed |
| Location | trunk |
| Subwoofers | 2x10" ported, ~1.2 ft3/side (real documented build above) |
|---|---|
| Box type | ported, dual-chamber |
| Location | trunk |
Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.
| Factory speaker size | n/a — this generation did not put speakers in the doors from the factory. Real, confirmed factory locations instead: dash (4x10") and, on some cars/years, kick panels. |
|---|---|
| Known obstructions | No factory door speaker location on this generation — matches the pattern already documented on our Corvette C3 entry for a different reason (there, no door speakers ever; here, the dash/kick-panel/package-tray locations were the factory design). |
| Adapter bracket needed | n/a — not a factory location |
| Factory speaker size | n/a — 2-door body styles only |
|---|---|
| Known obstructions | No rear doors on this platform |
| Adapter bracket needed | n/a |
| Factory amp / premium audio | No named premium-tier system or factory amplifier found — consistent with the era (factory-amplified 'premium' audio systems as a distinct marketed tier were not yet common industry-wide in the 1960s/early 1970s, the same conclusion reached on our other pre-1980s entries). Real speaker-count/location variation exists (dash-only base vs. dash+kick-panel vs. dash+package-tray combinations across years/trims) but no evidence of a branded amplified system. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward — trunk-based builds don't touch the original head unit. |
| Head unit | No replacement needed |
No independently measured trunk W x H x D found. Real, specific forum-documented build instead: a dual-10" ported box (2x Rockford Fosgate P1), 5/8" MDF, ~1.2 ft3 per side plus a 3"x8" port per side — real, specific, but one builder's result, not a manufacturer measurement.
Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.
Each link opens the tool with this vehicle already selected.
Measure your own vehicle. Trim levels, factory subwoofer options, and mid-generation changes all move these numbers, and a box cut to a researched figure that does not match your truck is wasted wood. Where a badge reads Unconfirmed, treat the value as a starting point for your own measurement, not as an answer.