K Member Fit

[Challenger10]

I’m going to be changing my 70 Challenger from a 318 to a 440 and I have found a B body big block K Member. Are the E Body and B Body K Members the same? Someone in the past has told me they were the same but I don’t trust that.
Thanks

 

[moparleo]

66-72 B-body, 70-74 E-body.

 

[edison1970]

You don't need to change the K member. If it was a V8 car, all you need are the big block mounts.

 

[Rapidfire]

Would probably upgrade torsion bars while your at it if you haven't already! A big block definitely changes things up front.

 

[Challenger10]

Thanks for the replies. So big block and small block K Frames are the same?

 

[Rapidfire]

Thanks for the replies. So big block and small block K Frames are the same?

Yes, as edison1970 said, you just need to change to the big block mounts on your 440.

 

[challenger6pak]

1971 and 1972 B body k frame is the same as E body. Earlier than 1971 B body k frames have a different steering box angle.

 

[Challenger10]

Sounds good, thanks for everyone’s help. I’m in pretty early stages on this thing so I’m sure I’ll be asking lots of questions, I’ve even thought about running the RMS system on it.

 

[HooToTheCore]

B-body K frames don't route the sway bar through the center of the K frame the way e body K frames do. So there is that difference. 318 and 440 ebody K frames are the same, but may or may not have a skid plate.

 

[Mark Selby]

70 b-body K-frame indeed has the sway bar running through the middle just like the E-body’s..... steering angle is different and angles the steering shaft more towards the drivers door which hopefully will benefit me with clearance with a Hemi.....

 

[Chryco Psycho]

I would not recommend the RMS over the factory system , at least drive one before you buy .