4 speed Conversion

[Allan Wilkinson]

I am converting a 68 Coronet to 4 speed, I have most of the parts but need a photo showing how the factory cut the floor before the tunnel (hump) tacks on. I know about being careful with the crossmember, and that it isnt cut to full size of hump. I see lots of pics of topside with hump installed, but nothing showing floor hole, please help. Much appreciated.

 

[5.7 hemi]

Put the 4 speed jump on the floor. Trace it. Now from that line come in 3/4” and that is you cut line. Do shallow cuts near the tb cross member. Now check fit, happy? Weld in it in! Done, enjoy a beer for a job well done.

 

[91r/t]

Agreed^^^ The hump will only sit in nice in one spot. I've seen a few factory holes cut pretty sloppy, so nothing you do will be any worse then the way they did it.

 

[vintage chromoly]

Here is my 68 coronet.

 

[vintage chromoly]

Don’t know how the **** field pic got attached. LOL

 

[vintage chromoly]

In the first pic, you can see the outline and the cut line that 5.7 was talking about

 

[vintage chromoly]

Also, I used JB weld epoxy to attach the AMD shifter hump. It’s not structural, so instead of welding it in, I epoxied it. The thought was, if I (or a future owner) wanted to convert it back to a column auto, they could remove it and weld in the floor part I cut out.

 

[Allan Wilkinson]

Thanks for the replies and great info.

 

[biomedtechguy]

Don’t know how the **** field pic got attached. LOL

That's my favorite post in this thread!
Pic lifted!