I inherited a 1969 roadrunner with a 440 sixpack setup. the car has 32000 miles on it. I decided to pull the engine to freshen it up. The owner of the machine shop said It looked like the engine was never rebuilt and suggested I find out more information about it before I tore it down. My father-in-law is the second owner of the car and told me the original owner changed the motor back in the early 70's. I am trying to find out if this is an original 440 sixpack engine. All the codes that I found state that it is a 1970 production engine. The cast iron manifold codes to 1970. The stampings on the endine pad read F440 10 15HP2. I would like to find out with definite proof, and of it's value for sale on market. Any help would be greatly appriciated. With the proceeds of selling this engine I could build another 440 that does not have the value of this engine.

 

Welcome,
So u got a killer ride there, can u post up a couple pics. We luv to see the old car!TTYL.....R.V.

 

Thanks for your intrest I will post pics as soon as possible

 

The car and motor isn't really worth anything......You should just give it to me!!!!

 

There is no conclusive way to differentiate the Magnum from the 6-pack versions externally that I know of. The numbers you gave indicate you do indeed have a 1970 hi-performance 440, with an engine assembly date of October 15th. The blocks for both versions were identical. A couple of clues to check, if it really hasn't been touched since new; distributor PN should be either 2875982 (auto) or 3438314 (4sp), if original; intake manifold casting number should be 2946275 or 276 for a '70; carb numbers should be one of the following- R4175, R4365, R4374, R4375, R4376, R4382, R 4383 (all '70 only). If the date codes on each check out with the engine assembly date, would be another good indication. The only way to conclusively verify it was built as a 6-pack engine, however, is to open it up and identify the differences that exist internally. The 6pack motors had slightly higher CR; I believe they used different connecting rods, cams, and pistons, but I'm not sure of all of the differences or how to spot them. I'm digging into it and will let you know when I have more info to pass on.

 

Teewjay, Thank you for the information. This engine and story behind it is quite the riddle. The manifold casting # is 2946276 with a casting date of 9 29 69. I will check the distributor and carbs and leave another message. So far so good. I will keep you posted.

 

TeeWJay has covered most of what I know. The only things I could add to enhance that would be factory 440+6 pistons had 4 valve reliefs and the factory six pak cams had three bolt timing gears. Those are the only diferences that would be noticeable internally. I have read and heard much discussions about the six pak rods and from the info I have not only did those heavy rods come in six pak motors they also came in 440HP motors in 1970+ and also some later truck 440 engines. I have a link that covers that issue if you want it. That will be noticeable by the six pak damper on the engine for external balance'd motors. The 1969 motors didn't have the heavy rods anyways and was stated above this looks to be a 1970 engine stamping. So your only true indication if it was a six pak engine that hasn't been rebuilt is the 4 valve reliefs on the pistons and a 3 bolt cam gear.

This link talks about Six Pak Rods:

Six Pak Rods

 

fc7gtx, Thanks for the info. I also had luck searching the net for info on the holley carburetors. There is a web site www.oldcarmanual.com that lists part numbers for holley carbs. The list numbers on my carbs read that they are from a 1970 440 3x2. My machinist at Straley Racing Engines told me that it has the external balancer. I will next check to see if it has the three bolt cam. Do you have an idea as to the value of this engine, if it is in fact a 440 sixpack engine?

 

I'm not up on recent prices of actual six pak engines since there is such a gray area with them(proveablility), but I would bet the biggest value you might get out of it would be to contact Galen Govier and give him the VIN off the pan rail. He might be able to locate the original car it came out of and if that occured the present owner might pay a pretty penny for that engine if it was an actual six pak engine. It would be a long shot but if anybody has a data base for existing VIN's its Galen.

Galen Govier Link

Chris

 

Thanks for all the information. I decided to rebuild engine. Upon tear down of engine, pistons with 4 valve reliefs were noted. Camshaft with 3 bolts were noted. Connecting rods were six pack rods. Piston to deck clearance is .022 noting 10.05-1 compression. Forged externally balanced crankshaft. I was also able to contact previous owner. He changed engine over thirty years ago. The original 383 was grenaded and he had a 1970 superbee 440 six-pack car that he had crashed. This is the story behind the engine swap. I will try to post pictures of the engine rebuild and installation as project progresses.