"what's the difference between the 396 and LS3 engine swaps in a 1971 camaro?"

Question

Accepted Answer

Great question! Here's the real deal on the 396 vs LS3 in a 1971 Camaro:

**The Original 396 Big-Block (what this car actually has):**
- 396 cubic inches, cast iron beast weighing ~680 lbs
- 260-350 horsepower depending on configuration
- Era-correct and numbers-matching (which this car is)
- Maintains collector value and authenticity

**Modern LS3 Swap:**
- 376 cubic inches but makes 430-525 horsepower - way more power!
- Aluminum block weighing only 445 lbs (235 lbs lighter = better handling)
- Fuel injected, more reliable, better fuel economy
- Not era-correct, but tons more performance

**The Reality:** This particular Camaro's listing is a bit misleading. While the title says "396/LS3," the description clearly states it has the original numbers-matching 396 with MacNeish certification. The LS3 mention is likely just for search visibility - this car definitely has the original 396 big-block.

So you're looking at a genuine 1971 SS 396, which is pretty special since only 1,533 were made that year. The LS3 would be a modern swap that sacrifices originality for performance. Which would you prefer - keeping it original or going for modern power?

1971 Chevrolet Camaro SS 396/ LS3

Classic cars

Cars for sale

Resources

1971 Chevrolet Camaro SS 396/ LS3

Become a CLASSIC Insider