400 motor

[B1gkountry]

Just pulled the engine out of my 67 charger (project). I am not a mopar guy so I took pix of the casting . Can somebody tell me what I have. I think it's a 400 from 11-73. I have a 440/727 ready to drop in from a motorhome will this just drop in or is a motorhome tranny different?

 

[BeepBeepRR]

What year motor home? If the transmission has a brake drum on the end of the tail shaft it will not just swap in. You will more than likely need to swap transmissions. But keep the torque converter from the motor home transmission and put it into the regular 727. Someone may have more knowledge than I. But it seems if you have a weighted torque converter it needs to be used with the crank from the 440. Otherwise vibration can occur. Really depends on the 440 you have.

This is the motorhome trans I have just to give you something to compare too.

 

[wyrmrider]

check both motors for any "new moon" shaped weight on the inside of the dampner or get a number off the dampner
cast cranks had weights and some forged cranks did too but different amounts
check both flex plates and converters for weights
if these motors were ever rebuilt they may have had cranks/ dampners/ converters/ flexplates swapped already and maybe if you are really unlucky not correctly. Easy mistakes to make then you have a shaker

 

[Bb70charger500]

Ahh a shaker just makes it faster!
That 400 will probably sell if you don't want it them boys love to stroke these motors.
Good luck !

 

[PurpleBeeper]

1. It looks like you do have a 73 400 engine
2. Bolt just the motor home engine to the transmission you already have.
3. These guys are right on cast/forged crank and specials weights/etc.

If you can post a few pictures of the main pulley on the motor home engine.... we actually need to see the harmonic balancer that the pulley is bolted to, people on this board will tell you what to do to bolt up the 440. It will either a) bolt up as-is or b)need a weighted torque converter (I believe one of two types?)

 

[Xp29h]

X2 on Bb70.. Said.. Stroke that 400! They go great! If not you will be able to get rid of it easily enough!

 

[5.7 hemi]

Strokey Strokey!!!!

 

[B1gkountry]

What year motor home? If the transmission has a brake drum on the end of the tail shaft it will not just swap in. You will more than likely need to swap transmissions. But keep the torque converter from the motor home transmission and put it into the regular 727. Someone may have more knowledge than I. But it seems if you have a weighted torque converter it needs to be used with the crank from the 440. Otherwise vibration can occur. Really depends on the 440 you have.

This is the motorhome trans I have just to give you something to compare too.

View attachment 567415

View attachment 567416

That is the one that's on it. It ran fine, how hard is it to swap the tail piece?

 

[B1gkountry]

So going to sell the 400, what should I ask it's has everything but distributor and alternator anybody interested. It's in Spokane Wa

 

[BeepBeepRR]

You have to get to a snap ring inside the transmission. Whichmeans pulling the pump and internals from the front. Doesnt look hard and basic tools required. However to swap clutch packs and stuff you need a spring compressor. Which is a special made tool. Or you can make one. I found a good video on youtube to tear down a 727. He is doing a A727 but it should be the same.
This series of videos will take you through all aspects of the 727

 

[BeepBeepRR]

The 400 low deck distributor won't work in the 440. You will have to get a 440 distributor. The shaft to oil pump is longer on the 440 distributor. The 400 is only worth what people are willing to pay. However as mentioned above several times. They make a bad *** stroker block. You could just leep it and build it on a budget. I have a 426 stroked 400 sitting in my garage.. Its not mine but my neighbors. Save some money buy parts here and there until you have the parts to build a stroker. Or sell it and fund the 440 upgrades..

 

[B1gkountry]

The 400 low deck distributor won't work in the 440. You will have to get a 440 distributor. The shaft to oil pump is longer on the 440 distributor.

Not going to build the 400. Just going with the running 440 and 727 off the 400.