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Original Message
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| It's most likely a 9-3/8" rear, not a 9" rear. |
| By Dave Shoe - 10/25/2001 6:10:27 PM; IP 12.2.11.131 |
Your Marquis most likely has a 9-3/8" rear end carrier (also known as a 9-3/4" because some ratios are the larger size).
This rear carrier assembly looks much like a 9" rear carrier (the 9" is also sometimes called an 8-3/4" due to it's 1957-1959 ring gear size), and it even fits into most 9" sheetmetal housings (but you've gotta add a notch to the housing to clear the extra large ring gear). The maincap threads are bigger, as are the ring gear threads, as are just about all other dimensions.
The bottom line is you won't be able to stuff 9" ring gears into your 9-3/8" carrier, so make sure you know which size carrier you have before placing the order.
Note that it's easy to plop a 9" carrier into a 9-3/8" housing. I run a 9" nodular carrier in my 1967 LTD which originally came with a 428 and 9-3/8" rear. No mods are necessary. Just be sure to match the axle spline count.
As to your original question: 3.50:1 gears will wake the car right up. Beware that you've got the pre-1968-1/2 type of posi in that car. It's called the "Equa-Lock" and it does not grip as solidly as the newer "Traction Lok". Still, it beats the heck out of an open carrier rear when it comes to biting in.
Shoe. |
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