Transmission cooler lines

[jsett83]

All,
I am on the homestretch of a 5.3/4l60e swap into 1987 squarebody. I bought universal 5/16 hardline to bend and run for the tranny cooler lines. The problem is, when i tighten the fitting into the transmission, they bottom out on the transmission housing before getting tight...is there something im missing?

The factory lines for the 4l60e were held in using a clip correct?Do i have to use that style connection??

Thanks in advance!