4L65E in a 68 FS C10

[GMJimmy]

I just put a new Wizard dual pass rad in my 68 C10. I had an issue with a fitting on the old rad and had to install an auxiliery cooler for a while. I'm planning on replacing my cooler lines to the new rad and need to know what everyone is using. I'm using the copper/nickel stuff but what size? 5/16" or 3/8".
Thanks

[LockDoc]

Originally Posted by GMJimmy

I just put a new Wizard dual pass rad in my 68 C10. I had an issue with a fitting on the old rad and had to install an auxiliery cooler for a while. I'm planning on replacing my cooler lines to the new rad and need to know what everyone is using. I'm using the copper/nickel stuff but what size? 5/16" or 3/8".
Thanks

The only thing I can tell you is that the original transmission coolant lines are 5/16". I'm not sure what size fittings the 4L65E or your new radiator use....

The Nicopp tubing is nice stuff. Easy to bend and won't rust. I use it for everything.
.