Does anybody know anyting about Casper Racing and these heads?

 

Heads look like GM winters heads. Casper is probably the shop that prepped them

 

Those numbers look like a Social Security number. I recall when people were stamping and engraving SS#s on stuff they were concerned about having stolen. FWIW, the 519 prefix is Idaho.

 

Pull a valve cover and let’s see the markings. May look like these:

 

 

thanks for the note back… We have not had the heads off just the valve covers, I took these pictures before I really knew what I was looking for. Does this tell you anything??????

 

I see the Winters casting mark on the inside and the number ending in 392 shows they are 1967 L88/L89 aluminum heads? A pretty rare set of heads.

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My thoughts exactly. Very desirable heads and costly to acquire since not made in large numbers, IIRC. Wonder if the Casper stampings are indicative of any modifications to these heads?

 

Pretty rare indeed...... with our race stuff, we do have some markings on the heads, so we can keep track of them, and to make sure we get back what we send in...... typically only for repairs, or for new seats and guides......

Curious to find out more about these......

 

I am curious about these heads too,,, I have tried to find out some things about Casper Racing and have not come up with very much….. does anybody know anything about Casper Racing??????

 

Here's what I found through Google AI:

Based on your continuous interest in Carl Casper and high-performance big-block hardware, you are likely looking for the ultra-rare performance cylinder heads associated with the era of his custom racing builds—specifically the Chevrolet Mark IV Big Block 427 hardware.
If you are hunting for vintage high-performance heads to replicate or restore a 1960s Casper-era build, you are tracking GM's top-tier, solid-lifter 427 race heads. Here is exactly what you need to look for:

1. The Ultimate Aluminum Heads: Casting #3904392
If your goal is tracking down the absolute pinnacle of 1967 race-spec 427 heads—the type that custom builders like Carl Casper and pro-stock racers coveted—you are looking for the original L88 / L89 Aluminum Heads. [1, 2]

• Port Type: Massive rectangular ports built strictly for high-RPM breathing.
• Chamber Design: Closed chamber (107cc for L89) or Open chamber (116cc for L88).
• The "Winters" Mark: Authentic vintage sets feature the famous Winters Performance "Snowflake" logo stamped directly into the aluminum casting. [1, 2]

2. The High-Performance Iron Alternative: Casting #3904391 / #3873858
If the build requires high-performance cast iron instead of aluminum, you want the heavy-duty rectangular port heads used on the L72 (1966) and L71 (1967) 427/435 HP engines. [ , ]

• Port Type: Rectangular.
• Chamber Design: 109cc / 107cc closed chamber.
• Flow Metrics: Known for massive intake runners that require a matching high-rise intake manifold to clear the block and make real power. [1]

3. Finding Authentic or Reproduction Hardware

• Vintage Swap Meets & Groups: Because these parts are heavily guarded by collectors, check specialized forums or communities like the Carl Casper Custom Corvette Facebook Group where period-correct parts for 1960s show-cars change hands.
• Modern Alternates: If you are building a Casper tribute car to drive rather than a 100% numbers-matching trailer queen, most builders bypass finicky 60-year-old iron castings entirely. They opt for high-flowing modern aluminum replacements from stores like Speedway Motors or Summit Racing to get vintage big-block looks with modern, reliable flow dynamics. [1, 2]

Are you looking to verify a specific date code on a pair of heads you found, or do you need help matching these heads to a specific vintage 427 intake manifold (like the dual-quad or Tri-Power setups)?

 

I don’t know anything about Casper, but I bought my set of 392 heads at a swap meet in NJ in 1980. Guy said they were an early set intended for racing in 1966. Bench racing is always fun, but rarely reliable. I paid $200 and intended to use them but never did.

 

Sounds like the OP's heads have an interesting history...if only they could talk.

 

Wonder if it's the came Casper that built all the hollywood cars like the newer Batmobile

 

We could use someone who can decode the SSN.......

Whenever I randomly use my SSN to identify things...... I always include my Mother's Maiden Name too...... you know...... to help look things up.......

 

Not a big help but, a brief search says 519 SSN's were from Idaho.

 

I posted on the nitromater.com site to see if anyone remembers, or has any knowledge of Casper Racing..... Will post here is anything comes up......

 

Did a search and came up with this.
Good luck

Carl Casper (Drag Racing & Custom Cars)

If you are looking at historic drag racing and custom automotive culture, Carl Casper is a legendary name. While he is world-renowned as a premier custom car designer and show promoter (producing over 1,000 car shows),
he had a significant footprint in professional drag racing:

• The "Young American" Top Fuel Dragster: In the 1970s, Carl Casper was the builder and owner of the famous Young American Top Fuel car. Driven by the legendary Danny Ongais, Casper’s team famously went head-to-head
  with and defeated Don “Big Daddy” Garlits at major events like the 1970 NHRA Supernationals.
  
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