B-O-P bolt pattern Q

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B-O-P bolt pattern Q by fiero_silva

Started on	: 11-05-2003 12:40 AM
Replies	: 2
Last post by	: ray b on 11-05-2003 09:45 AM

fiero_silva
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Report this Post11-05-2003 12:40 AM

quote

Both the TH425 and TH325/-4L have the B-O-P bolt pattern. If you are using a B-O-P engine, that's fine, but for anything else, you'll need an adapter.

what is the BOP bolt patern and which engines have it.

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perkidelic
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Report this Post11-05-2003 01:14 AM

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BOP stand for Buick - Olds - Pontiac. These three divisions (and older rear-drive Caddys) used a different bolt pattern on the transmission bellhousing than Chevy did. To mate a Chevy (SBC or BBC) motor to these trannies you need an adapter plate.

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ray b
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Report this Post11-05-2003 09:45 AM

for th350-400 auto trans ONLY they swap
some like the older dyno 4 speed autos DONOT SWAP my 400 70 buick had a dyno patern

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