Some even have a 6 bolt mount. I just installed a real 69 GM L88 converter in a 400 here and it's a 6 bolt flexplate mount. The flexplate only had 3 of the 6 holes, so I only used the 3. Could have drilled the other 3 just wasn't ambitious enough.
The last 4L80E I had here had a GM converter in it and it was a 6 bolt.
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2019 Pontiac Heaven class winner
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