On my 65, I had a C4 and now a 4R70W. I have a pair of OEM style steel lines that go directly from the transmission, by the starter, over the steering linkage, along the RH side of the oil pan and directly to the radiator or transmission cooler mounted in front of the radiator, There are 2-3 clip on tabs that hold the lines in parallel (IN/OUT),and one clip that attaches the lines to the engine. It may be different on a 67.

 

Try this:

https://www.vintage-mustang.com/threads/seeking-pics-of-c4-trans-cooling-line-bracket-clips.1010018/

 

I’m not sure if you planned on changing anything else out, but when we swapped the C4 for the C6 that’s in our ‘70 now, we got an oil cooler kit with braided stainless lines and AN fittings. It was probably $250. Mounted the cooler on the radiator support up front and used little screw in hose clamp’s in a few spots with heater hose for chafing. Didn’t have any issues with the long tube headers or anything else when routing the lines.

 

Yes there is a cooler already.

 

This might help.

 

What year is that? I just did mine in a 67 C code C4. There are clips holding the lines together in that area but nothing securing it to the block.

 

Get ye the chassis assembly manual. Routing and installation is covered in the transmission install drawing for your particular combo. Except for being clipped togeter at one point the run unsupported from the cooler to the trans body.

A crowfoot flarenut wrench makes the job on the trans side easier.

CHASSIS ASSEMBLY MANUAL, 67 MUSTANG - L-35D - National Parts Depot

Buy Part#L-35D - CHASSIS ASSEMBLY MANUAL, 67 MUSTANG

www.npdlink.com

 

If you want, I have SS lines for a 1968 w/ C4 that I won’t reuse (changing to manual). Let me know if you are in need.

 

How much to ship them to 78211? Any pictures?