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all 440's are 6-packs
just like all chev 350's are LT1s

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The "C" on the pad means "Special Rods & Pistons". That is a six pack block. There should also be a "C" on another spot on that block if it's a real six pack and someone hasn't just put the C on the pad. I'll PM you with that location.

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so it's a secret??? I thought this was a "question & answer" board...just think the havoc I could wreck if I knew the secret location of the magical "C" stamp.

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There are hidden numbers and symbols on all vehicles that the general public doesn't know about. These are put there for reasons you should be able to figure out. .....

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The "C" on the pad means "Special Rods & Pistons". That is a six pack block. There should also be a "C" on another spot on that block if it's a real six pack and someone hasn't just put the C on the pad. I'll PM you with that location.

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Sorry dude, I'm calling BS on that one, I've owned more than one numbers matching 1970 440 Six Pack car and NONE of them have had the magical "C" you mentioned. I'm not saying that SOME may have had a "C" stamp, but it's certainly not something that positively identifies any 440 as a six pack block, there is only one way to do that and that is to match the blocks VIN sequence# to an original 440 Six pack car, as far as cranks and rods go, all 70 440's used the same rods and cranks, the Six Packs did use unique pistons which had valve reliefs on both sides, but that's an easily changed out componant so unless you know for certain the engines never been appart it's not sure bet. PERIOD END OF STORY!


Same goes for your comment about "secret" numbers stamped into cars in hidden places (other than the already well known locations). I hate crooks and thieves as well but that's pure fantasy urban legend.

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....I've owned more than one numbers matching 1970 440 Six Pack car and NONE of them have had the magical "C" you mentioned......

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Just curious, have you had the bathtub/intake gasket off on all those 'matching numbers' cars? And I'm thinkin' the 'C' six-pak reference is for 69 1/2 cars.

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Just curious, have you had the bathtub/intake gasket off on all those 'matching numbers' cars?

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I've never owned one with the original intake gaskets, they'd all been R&R'd at one time or another, but I do have good clear photos of the block pad stampings as well as the block VIN# sequence stampings and matching VIN tags if you ever need to see proof to say, settle a bet?

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all 440's are 6-packs
just like all chev 350's are LT1s

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Smart [Edited by Moparts - Keep it clean].

The engine needs a rebuild, block looks untouched (other than being torn down) and has the six pack crank and connecting rods. That and the engine shop that has it says it came from a six pack car. The engine was dropped off for a rebuild awhile ago and work started but then divorce hit, couldn't pay the bills and forfeited the engine block in lieu of payment.

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has the 6pk crank ???

does the shop still have the pistons they removed from that engine ???

i'm not buying the its a 6 pk because every knows that a 6pk block is an HP2 ...

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Oh and my understanding is that HP2 does not mean anything other that second shift of production.

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Just curious, have you had the bathtub/intake gasket off on all those 'matching numbers' cars?

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I've never owned one with the original intake gaskets, they'd all been R&R'd at one time or another, but I do have good clear photos of the block pad stampings as well as the block VIN# sequence stampings and matching VIN tags if you ever need to see proof to say, settle a bet?

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I wasn't asking if they had original valley pan gasket, rather I was asking if you had viewed the complete pad. I've noticed that as a general rule, the 'C' is at the back of the pad and the valley pan is usually covering it.

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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.

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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?

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