700R4 Trans Cooling Lines options/recommendations?

[BlazerBill]

This post is now here in the proper automatic transmission category. I’ll try to delete it from the manual transmission category.
1983 K5/ SBC350/4wd: I’m installing a new 700R4 trans and I’m in need new transmission lines. I’ve read several previous posts with different opinions on which types of lines would be best to use. Some say to install entire length factory pre-bent style hard lines, some say to use flex lines or rubber hose on the ends of hard lines or in between sections of hard lines. What’s the consensus for the best lines (quality,brand,material), configuration and size (O.D., I.D.) and length (5’, 7’) to use? I provided photos of options for reference purposes. BTW, the engine and trans are currently out of the vehicle which will make hard lines easier to install before installing the eng/trans combo. Thanks everyone!

 

[Ricko1966]

I just bend my own from steel tubing from the parts store,cheap,fast and easy,and it's how it was done out of the factory. My 1986 C10 still has the original unmolested lines,they don't leak,it's kinda like GM knew what they were doing.

 

[idahovette]

^^^^^^THIS, especially if it's out of the truck^^^^^^^^^

 

[PrairieDrifter]

I would run my own hardlines or like hydraulic crimp style hose, along the frame rail instead of along the engine pan rail. Don't run rubber hose and hardlines, doesn't last.

The advanced adapter hoses work good, they're just too long. I've got 35,000 on mine. Depends how you want it routed.

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[Old Guy Bill]

The hard lines from Inline Tube is what I used, they fit well. But I am working on just a frame no cab installed yet.

 

[mrdap]

Steel lines.
Factory replacement reproduction steel lines are going to be your easiest route.
If you have the skills and the tools you can bend your own as suggested.
I would avoid rubber hose myself.

 

[Doppleganger]

I got the stainless set from Inline. Mocked up - they seem to fit like the originals.

 

[timbritton]

I bent my own lines from steel coated lines. Patience and try using old ones as a pattern.