1970 Chevrolet Impala
B-body · New 400ci small block and 454ci big block available. Custom ... · The big-block Impala at its most powerful — and the end of an era
Highly Collectible
Production & Overview
Total Production
592,724
Original MSRP
N/A
Assembly Plants
Multiple GM plants nationwide
Wheelbase
119 inches
Body Styles
Sport Coupe · 4-Door Hardtop · Convertible · 4-Door Sedan
Curb Weight
3,835 lbs
Notable Packages & Production
454/450hp — LS6
3-5x base
Unknown
produced
Available Engines
L65 350ci — V8
Base V8
250 hp
LS3 400ci — V8
New 400 small block
265 hp
LS5 454ci — V8
Big block standard output
390 hp
LS6 454ci — V8
High output 454 — most powerful Impala engine ever
450 hp
Buyer Checklist
⚠ Clone warning: LS6 non-matching loses 60%+. Always verify with cowl tag, engine stamp, and registry before purchase.
Verify engine option via cowl tag
LS6 cars — verify engine suffix code carefully
Check body for rust — lower quarters and trunk
Inspect convertible top frame if applicable
Verify correct transmission for engine combination
Check for correct big block exhaust if equipped
Look for build sheet under rear seat
Road test all systems
Inspect for frame rust
Check all chrome trim and bumpers
Known Problem Areas
Rust in lower body panels
Trunk floor corrosion
Big block engine replacement
Convertible top mechanism wear
Chrome trim deterioration
Frame rust on high-mileage cars
What Drives Value
↑ Increases Value
LS6 454/450hp numbers-matching
Convertible with big block
Low mileage original
Documented cowl tag matching
↓ Decreases Value
Non-matching numbers
Structural rust
Convertible with top issues
Heavy modifications
Restoration Overview
Difficulty
Medium
Parts Availability
Good
Driver Quality Cost
$12,000 – $22,000
Show Quality Cost
$28,000 – $60,000
Key Suppliers
Classic Industries · OER · Golden Star
Pop Culture & Legacy
Last of the great convertible Impalas — declining production
LS6 engine option makes this one of the most powerful full-size cars ever built
Strong following in lowrider and custom car communities
Other Chevrolet Impala Years