hello from New Zealand, 18 spline head ache a833.

Phreakish said

Yup. That bearing goes into the larger diameter cut which is typically used by the snout of a converter for an auto trans.
I use the roller bearing in my 4spd 408 setup. So far, no complaints.

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this has been some good new for the day !

i didnt even think of that, i guess thats the extra 20 years of experience :)

i am a bit worried that my OD is a bit too small to fit that bearing tho, but i could machine up a bronze bush