Posted By: Anonymous
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This one has 70K on it. I have a few 402 pans and the 70 HP manifolds and car mounts. Glad to hear that it will work. I assume the trans has a different spline on the output? I have the original trans from the car so I may use it. I also assume since its a 70 model it would have 906 heads? Or did they use something else on truck/motor homes?
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I appreciate the info. What pan number did the 70 use? I will need to hunt one down. I just built a 70 383 for my Road Runner and used the 402. Is it correct? If not, did it use the 440 6 quart also? I think Mopar Performance sells a 6 quart and pickup? Would it work on the 440?
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I am not going to focus on correct internals. I do want it externally correct as possible. I just want to freshen it up with existing internals. Since I am doing this I will most likely use a 727 that is currently behind a 69 383. Can I use the stock converter that is on this trans. or do I need a 70 style?? I need one more schooling on the internal/external balance issue. 70 is when they changed it correct? I am just trying to avoid future problems with vibrations. Could I simply use the converter from the trans. that is currently on the 440? Or use the complete trans if it has the long tail shaft? I don't have enough experience on pans so I better got the 6 quart and tube from Ma Mopar. I assume it will look fairly correct?
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I am not going to focus on correct internals. I do want it externally correct as possible. I just want to freshen it up with existing internals. Since I am doing this I will most likely use a 727 that is currently behind a 69 383. Can I use the stock converter that is on this trans. or do I need a 70 style?? I need one more schooling on the internal/external balance issue. 70 is when they changed it correct? I am just trying to avoid future problems with vibrations. Could I simply use the converter from the trans. that is currently on the 440? Or use the complete trans if it has the long tail shaft? I don't have enough experience on pans so I better got the 6 quart and tube from Ma Mopar. I assume it will look fairly correct?
Yes, 70-71 440 HP and 6-pk got EXTERNALLY balanced due to the heavy rods.
Assuming it's not been cobbled over the years, a motorhome trans will have an external parking brake and will be a short-tail. No good for car use.
If this 70 engine is internally-balanced any 67-newer 'internal-balanced' 727 converter will work. Sounds like either the MH or the 69 converter should be OK. Whether it will give a desirable stall speed is another matter.
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Good deal. I have heard of some 70's truck motors that have the six pack rods and crank. I don't know if there is any truth to it? I guess I will find out on teardown. As far as the trans goes, should I just scrap it or one of the other posts said he changed out the tail shaft and housing and used the trans. What are the last three on the six pack rods so I can check them. I am not concerned with stall speeds. Not after performance. Just want a nice reliable drivetrain.
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I am not going to focus on correct internals. I do want it externally correct as possible. I just want to freshen it up with existing internals. Since I am doing this I will most likely use a 727 that is currently behind a 69 383. Can I use the stock converter that is on this trans. or do I need a 70 style?? I need one more schooling on the internal/external balance issue. 70 is when they changed it correct? I am just trying to avoid future problems with vibrations. Could I simply use the converter from the trans. that is currently on the 440? Or use the complete trans if it has the long tail shaft? I don't have enough experience on pans so I better got the 6 quart and tube from Ma Mopar. I assume it will look fairly correct?
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Yes, 70-71 440 HP and 6-pk got EXTERNALLY balanced due to the heavy rods.
Fixed
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I hope this doesn't sound stupid but I am trying to digest this internal/external balance issue. If the 440 truck engine has standard rods it will be internally balanced and I can use the 69 727 convertor and all? I assume I need to use the existing balancer that is on the 440? Now, if it has the H duty rods and crank and is externally balanced what if anything do I need to do in order to use the 69 trans.? I always thought the harmonic did the work no matter what crank and rods it had? How else could it be externally balanced unless weight was added to the flex plate? I am still a little confused here? I just want to avoid vibration issues with this project.
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Is the B&M flex plate supposed to make up for a converter that is built for an internally balanced motor?
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For some reason I am still having trouble with this because I think all cranks are balanced by the manufacturer? At least all 383 and 440 cranks I have seen have drilled balance holes in the counterweights. I am thinking its dynamic balancing? I am no expert on this but thats always what I have assumed?
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I also thought that the torque converters were balanced totally separate from engine? More as an aft of the crankshaft.
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Now I am getting it! I will need to use the balancer and converter that are currently on this 440 (if it is externally balanced) correct? If internally balanced I can use the 69 converter. Once again I am no expert on this subject but when they balance the rotating assy. ie: rods, pistons don't they simply match the weights of these internal so they are all exactly the same? Isn't this achieved by removing material from the rods and pistons? I would think Chrysler would have done this to the HP and Six Packs and not the standard engines? Seem backwards to me?
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They didn't put 440s in trucks in 1970. Are you positive it is a 440, and if it is, are you positive it is original to the vehicle. The 413 was a common large truck/motorhome engine.
Then again anything is possible so it could be an original 440.
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Someone will correct me if I'm wrong (where's JohnRR ) but I believe 7T refers to a 77 engine, T for truck, E for cast crank. Regardelss, a 69 block would be E440.