1973 Mustang · Restoration Cost Estimator
A 1973 Mustang restoration costs $20,000 to $180,000+, all-in.
The 1973 is the last of the first-generation Mustang — and the last convertible until 1983. That makes the open-top car the most collectible of the 1971–1973 generation. Getting the restoration right means understanding what's unique about this final year. Pick your body, condition, and scope. The estimate is itemized.
Researched by Dorian Quispe · Owner, 1967 Mustang Fastback · No parts to sell.
Pricing reviewed by Dorian · April 2026
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We'll calculate your all-in cost vs. current Hagerty market value.
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The last classic Mustang — what that means for restoration
The 1973 Mustang arrived with federally mandated 5-mph impact bumpers front and rear — a significant visual change that defines the car's nose and tail. The front end was redesigned specifically for 1973 to incorporate the energy-absorbing bumper system, giving it a distinct appearance from the 1971 and 1972. This matters for restoration: the 1973 front bumper is unique to this year and cannot be substituted with a 1971–1972 unit for a period-correct build.
The 351 Cleveland in Cobra Jet tune remained the top performance engine option, though output continued to decline due to emissions tuning. The big-block options — the 429 CJ and 429 SCJ that appeared in 1971 — were gone. The Mach 1 package kept the car relevant as a performance machine on paper, but the high-water mark for performance in this generation was the 1971 Boss 351. The 1973 is the end of the road for classic Mustang performance, which is precisely what gives it collector weight.
The convertible is the story of the 1973. Ford discontinued the open-top Mustang after this year, and it would not return until the 1983 Fox-body. That ten-year absence — and the knowledge that the 1973 was the last — gives surviving convertibles a historical weight that coupes and fastbacks of the same year do not carry. A correct, well-documented 1973 convertible supports a show-quality restoration budget better than any other car in the 1971–1973 generation.
[EEAT NEEDED: first-person observation comparing the sourcing reality of 1973-specific trim versus the 1967 — a specific example such as a price difference on a front bumper assembly, a lead time on a correct convertible top, or a shop's comment on the impact bumper restoration complexity]
Mach 1 and Convertible — what they cost to restore correctly
The estimator numbers cover a standard 1973 build. The two variants that justify a higher scope — and a higher budget — are the Mach 1 and the convertible.
Mach 1 with 351 CJ — $2,000–$5,000 over a standard SportsRoof
The 1973 Mach 1 was SportsRoof-only, carrying the NASA hood, honeycomb rear valance, and unique body striping. With the Boss gone, the Q-code 351 CJ is the engine to have in a 1973 Mach 1 — verify the cowl tag and door data plate before paying the Mach 1 premium on any car. Trim pieces show high crossover with the 1971–1972 Mach 1, which helps availability. A documented CJ-engined Mach 1 SportsRoof is the strongest performer at auction in the 1971–1973 generation and is the one build where show-scope economics can work. Verify via Marti Report.
Convertible — $4,000–$10,000 over a comparable coupe, plus convertible top
The 1973 convertible is the most significant car in this generation. Production numbers were low, and surviving examples have been declining for fifty years — rust tends to attack convertible-specific reinforcements in the rocker panels and torque boxes. A correct restoration requires sourcing the convertible top, rear quarter glass, and convertible-specific interior trim, all of which take longer to find than equivalent coupe pieces. Budget $1,200–$2,500 for a quality canvas top alone. This is a specialist job — do not take it to a shop that has not done 1971–1973 convertibles specifically. The payoff: a correct show-quality 1973 convertible is genuinely appreciating. CJ Pony Parts carries convertible top assemblies for the 1971–1973 platform.
The bumper question — the unique '73 restoration challenge
Every 1973 restoration hits the same wall: the front bumper system is unique to this year. The 5-mph federal standard required an energy-absorbing design that the 1971 and 1972 bumpers did not meet — so Ford redesigned the front clip for 1973. The result is a bumper and valance assembly that cannot be sourced from a 1971 or 1972 parts car.
Reproduction quality for 1973-specific front bumper components varies widely. Some repro units require fitting work and don't align to factory tolerances without modification — that means additional body labor time. For a driver or restomod build, this is a manageable inconvenience. For a concours restoration where the bumper must be period-correct and gap-perfect, budget additional time for sourcing and fitting. NOS units occasionally appear at swap meets and on specialty forums; they are worth the premium for any show-scope build.
The rear bumper uses the same 5-mph energy-absorber system but shares more crossover with other years. It's less of a sourcing problem. The front is where budgets slip on '73 restorations.
Is a 1973 Mustang a good project car?
It depends on which car and which scope. The platform economics are the same as the 1971 and 1972: lower values than the 1965–1970 cars, thinner aftermarket, and fewer specialists. A show-quality restoration on a standard 1973 hardtop coupe will not recover its cost at auction. A driver-quality build on a clean coupe or SportsRoof makes sense if you want a classic Mustang at a lower purchase price than an equivalent 1967–1970 car.
Where the 1973 diverges from the 1971 and 1972: the Mach 1 and the convertible have real appreciation momentum behind them as the "last classic Mustang" narrative gains traction among collectors who came of age watching these cars. A documented, numbers-matching Mach 1 with a 351 CJ is no longer a budget substitute for an earlier car — it's a legitimate primary acquisition. The same is true for the convertible at a higher threshold. These are the two 1973 builds where show-scope economics can work.
If you're comparing a 1973 against a 1968 fastback at the same purchase price, the 1968 makes more economic sense for most restorations — deeper aftermarket, more specialists, stronger resale across all body styles. The exception is if you specifically want a 1973 Mach 1 or convertible, in which case buy the right car, budget the bumper work, and restore it to the scope the car actually supports. Use the estimator above to run the numbers before committing to a purchase price.
Parts sources for the 1973 Mustang
Sheet Metal & Bumpers
National Parts Depot
Best 1971–1973 sheetmetal coverage including floor pans and trunk pans. Check current inventory on '73-specific front bumper components before sourcing elsewhere.
Interior, Trim & Convertible Tops
CJ Pony Parts
1971–1973 interior kits and convertible top assemblies. Convertible-specific hardware sourcing can be slow — verify availability early in the project timeline.
Engine & Electrical
Summit Racing
351 Cleveland has strong aftermarket support at Summit — wiring harnesses, engine components, and suspension upgrades for the 1971–1973 platform.
Transmission
Modern Driveline
T-5 and Tremec conversions for the 1971–1973 platform. The larger 1971–1973 engine bay is well-suited to T-5 swaps and big-block restomod builds.
Affiliate links — PonyRevival earns a small commission at no cost to you. These are the suppliers I'd actually use; no one paid to be listed here.
Read the full cost breakdown
The estimator gives you totals. The guide explains what drives each number — shop rates, labor hours, and the hidden costs that show up mid-project.
Classic Mustang Restoration Cost Guide →What is a finished 1973 Mustang worth?
The 1973 is the last classic Mustang — and the last convertible Ford would build for eleven years. The convertible carries a last-year premium that doesn't fully track restoration cost, but it's real. SportsRoof values are consistent with the 1972. Data is thin across all body styles.
| Body Style | Driver-Quality | Restomod |
|---|---|---|
| Hardtop Coupe | ~ $12,000 (limited data) | ~ $19,000 (limited data) |
| SportsRoof | ~ $26,000 (limited data) | ~ $42,000 (limited data) |
| Convertible | ~ $28,000 (limited data) | ~ $48,000 (limited data) |
Convertible values carry a last-year-of-production premium. The 1973 was the final classic Mustang convertible before the 1983 Fox-body resumption.
Based on 14 BaT sold listings, April 2025–April 2026. All body styles limited data. Values are directional medians — sample size is too small for statistical confidence. Use as a planning reference only. Updated quarterly.
Category cost guides
Deep dives into the categories that blow up every budget.
Category Guide
Engine Rebuild Cost
351 Cleveland through Boss 351 — machine shop rates, core risk, and the stock-vs-performance decision.
Category Guide
Rust Repair Cost
The most unpredictable budget item. Floor pans to frame rails — what each zone costs.
Fuel System
Signs Your Carb Needs Rebuilding
Eight symptoms, the rebuild-vs-replace decision, and cost ranges for parts and labor.
Compare with neighboring years
The 1971–1973 platform shares significant parts. If the 1973 is your target year, comparing against the 1972 sharpens your purchase decision — and the 1967 is the benchmark for aftermarket depth and resale.
Browse by year
Each year page pre-loads the estimator with the right era defaults.
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