Yes, I looked at the entire pad, they didn't have a C, in fact my photos are of the blocks without the intakes installed.

OK all...check out this one: a super rare, special order, 1978 440 with the "lot-o-sixes" super-street machine package! and yes, these ARE factory orginal stamps...just someone screwing off on the assembly line.nothing more.

I have a 70 six pack engine in the shop, it has the c your talking of and its an original 6 pack engine. also has HP 2. The C is a designation for special crank and rods. As far as ALL 70 engines having the special parts, its BS. I've owned 3 that were stock engines that all had std rods, pistons and crank. As far as secret goes, are we not here to help each other?

Thanks 426HEMIDAVE. It would seem the '69 Six Pack blocks don't have the magical "C". I've encountered three '70 six pack blocks that all did. I've got one in my garage right now. You're also correct about the other '70 440 engines, they don't all have the six pack rods. I own a factory '70 440 "U" code 'Cuda HP that does NOT have six pack rods in the engine. There may be no way of clearly telling a '69 Six pack from a 4 bbl. engine except for the VIN. The "C" started appearing in the 1970 engines.

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Thanks 426HEMIDAVE. It would seem the '69 Six Pack blocks don't have the magical "C". I've encountered three '70 six pack blocks that all did. I've got one in my garage right now. You're also correct about the other '70 440 engines, they don't all have the six pack rods. I own a factory '70 440 "U" code 'Cuda HP that does NOT have six pack rods in the engine. There may be no way of clearly telling a '69 Six pack from a 4 bbl. engine except for the VIN. The "C" started appearing in the 1970 engines.

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You guys don't need to back each other up concerning the 1970 440's all having the heavier six pack internals or not, I made a blanket statement concerning what internals a 70 440 would have. I'm the first one to admit that Chrysler was a bit hit or miss when it came to "standard" procedures or parts, exceptions are more common than not. I will say that all 70 440's SHOULD have had the Six Pack internals as it was a design change that was made accross the board after having a number of lower end failures with the 691/2 cars. That being said it's quite possible the some 70 cars still recieved the lighter weight parts, especially early built cars.

My main reason for posting in the first place is that there has been a TON of misinformation tossed around about "how to id a 440+6 block", and the bottom line is simple, it's all tied in to the VIN# and some other basic stamping features that any regular 440 HP could also have (including the C stamp).

There's no other sure fire way to tell one from the other except for the VIN, no C, no secret stampings, no decoder ring required.

You may be correct there. My '70 'Cuda was built in Oct. 1969 so it would probably be considered an early build car. There were most likely 440 Six Pack engines built without the "C" stamps but every block I've seen with the "C" stamps ('70 & '71) has been a Six Pack. Nothing is certain in the Mopar world.

Scott, I think you're not making the point, you are trying to make.

1970 440s:
T - 350 hp - steel crank, "LY" rods, STD balancer
U - 375 hp - steel crank, H.D. rods, counterweight balancer
V - 390 hp - steel crank, H.D. rods, counterweight balancer

The '70 "T" engine was never available in a B or E-body, so those plants never had need for the "LY" rods, but the balancer was the same as the 383s. I'd be more inclined to believe any '70 440'Cuda with "LY" rods in its original numbers matching block has had engine work early in its life, after the warranty was gone. The used/rebuilt H.D. ("six pack") rods would've been harder to come by at the rebuilders.

Yes Dan, You are correct. I was speaking of 1970 440 HP or Six Pack engines only.

Great Guy's! I love this Form especially the Joker. I get a laugh about that. You can now google Magical C and this Form pop's up. Okay then on a serious note; In 1969 the first 440 6 Bbl. engine package was produced with a special rods, crank, timing chain, camshaft,valve springs,and intake system. This package was continued in 1970 & 1971. In 1971 the 440 6 Bbl. along with the 426 Hemi were the last truly high performance vehicles produced. Here's another Great!! Fact!! In 1971 B engine performance returned to Grand National Racing. On July 4th 1971, 4 cars with 426 cubic inch versions of the 440 with ported 440 heads were entered in the Daytona Grand National Race and finished 1234. Performance and reliability have always been the trademark of B engines. Thanks for the Magical C guy's, what a hoot! I cant tell you what it means, my speculation is; Dealership Stamped for proof of work being done, meaning (more than likely a recall). I sure loved my GTX it had one of these engines but it was the 4 Bbl. version. But still an RB.

....and in August of 2009, the true meaning of the "Magical C" was uncovered. Or would that be created?

And then there's this...but it appears not to include HP 440