37-39 UL tanks

[Robert Luland]

Howdy! On a 37-39 UL tank set. Which one of these is right? Thanks,
Bob L

[len dowe]

ones on the left Bob.

[Robert Luland]

Guess I better upgrade my request. My quest has to do with the reinforcement ribs. I’m trying to figure out whether the white set without the ribs is a repro or not. Have at it boys!

Bob L

[Jerry Wieland]

Bob

Stock UL tanks have those ribs. I am just not sure if all are supposed or when a change would have occurred.

Jerry

[Chris Haynes]

Can you show a picture of the tops of the tanks side by side?

[Robert Luland]

Here ya go!

[Chris Haynes]

I thought they might have been XA tanks but they are not.

[villy]

As far as i know 37-39 flathead tanks does not have the ribs.
Villy

[39 UL]

The white ones without the ribs look correct. The rear mounting stud on the ribbed set is too low for a UL frame, and the bottom front tab is too far forward. Hope this helps.

[37ul]

after doing research while shopping for tanks for my '37 UL i was told that the non-rib tanks are '37/early '38.