Jim Lusk
Well-Known Member
Still expensive, but better. I saw one go for $75 at Spring Fling a couple of years ago. That was AFTER I had told the seller what he had...
Big Block K Frame Identification
- Thread starter musclecargeek
- Start date
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musclecargeek
Active Member
Here's another Big Block K Frame I believe? Sorry for being a pest but, I want to make sure not to make a mistake. Its says small block in ad.
MOPAR 1975 K-Member for A-Body | eBay
MOPAR 1975 K-Member for A-Body | eBay
That is a SB V8 K frame just like that ad says. You need to go watch Jim Lusk's video over and over until you understand the process.
Fast340cuda
Well-Known Member
The mounts on that k frame look like they have been cut off and rewelded in the big block position to me.
Jim Lusk
Well-Known Member
That is an ORIGINAL Direct Connection K-member.
musclecargeek
Active Member
Ok, I watched your video (thanks for sharing with everyone) and now I believe I can tell BB K-Frames. eBay one above was a Direct Connection Big Block as you stated. Sold now so I am out of luck.
See attached photo. Red Circle area on a DC K-Frame will be closed up by metal plate and the red arrow area of the spool mount support will have a straight triangle side. A home made V8 to BB K-Frame wont have a straight triangle side where the red arrow is and will be set back where you cut the mount to move it back.
Also, I was concerned about what you said in your video about the strut rod holes being oval and the shimmy at high speeds. Was that pertaining to that particular K-Frame or inherit to DC BB K-Frames? Wasn't Sure.
Jim Lusk
Well-Known Member
That was that K-member only. The fit was sloppy on the reinforcing plate.
The tell on the DC is the plate you mention along with a similar one other side and the piece welded from the back of the driver side saddle down to the main body of the k-member. The part with the arrow is on all 73-76 V8 k-members.
The tell on the DC is the plate you mention along with a similar one other side and the piece welded from the back of the driver side saddle down to the main body of the k-member. The part with the arrow is on all 73-76 V8 k-members.
musclecargeek
Active Member
Ok guys round two. I need your help again. Purchased another K Frame that is supposedly a DC BB A-Body. See attached pictures. I’m getting mount offsets of 3/4” on the passenger side and and 1 3/16” on drivers side. Inside dimensions of the perches are 3 15/16. Number stampings on the bottom are 452M401 and 453M401.
Jim Lusk
Well-Known Member
Yes, that is a DC k-member.
Mr. Sinister
Devastation Manager
I agree with Jim on this those are the dimensions in the old DC engine books that have simple prints of that layout.
musclecargeek
Active Member
Appreciate the help here guys. Glad to hear I finally have the correct K frame.
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