PY Online Forums - Bringing the Pontiac Hobby Together

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- 61-66 Big Pontiac TECH (https://forums.maxperformanceinc.com/forums/forumdisplay.php?f=428)

- - 2004R into the ‘62 Cat (https://forums.maxperformanceinc.com/forums/showthread.php?t=882582)

56GMC

10-13-2025 03:50 PM

2004R into the ‘62 Cat

Planning to replace the slimjim with a recently acquired 2004R this winter. Looking to use the Bendtsen adapter plate & flexplate spacer from Butler to mount the trans & starter to the OE 389. Has anyone done this conversion as I would greatly appreciate their input?

stevep

10-13-2025 04:50 PM

If you have a 2.69 rear, you probably will need to go to a 3.23

56GMC

10-14-2025 02:12 PM

Already put in a 3.42 posi so I should be set.

Scarebird

10-14-2025 04:19 PM

200-4R's seem to like mid 3's.

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