9'' Rear End

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kcomet67
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Joined: Mon Jan 31, 2022 1:03 pm

9'' Rear End

Post by kcomet67 »

Does anyone know if a 9'' rear end from a 65 f100 will fit under my 67 comet? What all goes into that swap? Is it even worth the trouble to do it?
1967 Comet 202. 289. Work in Progress
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Joe Travers
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Re: 9'' Rear End

Post by Joe Travers »

I wouldn't spend the time or money on a 9" swap w/ your current drivetrain, speaking from experience.
Only situation you would need it is big torque under the hood upgrade and a lead foot. Otherwise, you're just spinning extra mass that robs power.

Joe
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1963 1/2 Custom Hardtop
342 stroker, solid roller, T-10, 3.55 posi

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SASSY
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Re: 9'' Rear End

Post by SASSY »

Too wide, spring perches wrong place.
You probably have an 8" in the car which is a good rearend.
I'd rather do it myself if it's done right or not,,,isn't that what hotrodding is all about?
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poboyjo65
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Re: 9'' Rear End

Post by poboyjo65 »

It will be too wide. I narrowed one from a 79 truck. but it also has fatter tubes so the ubolts and shock plates need to be replaced ,also the leaf pads need to be moved
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SASSY
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Re: 9'' Rear End

Post by SASSY »

Joe Travers wrote:
Tue Jan 03, 2023 2:06 pm
I wouldn't spend the time or money on a 9" swap w/ your current drivetrain, speaking from experience.
Only situation you would need it is big torque under the hood upgrade and a lead foot. Otherwise, you're just spinning extra mass that robs power.

Joe
Plus the weight! I feel that lump throwing the back of the car around when I get on it in the twisties. If it wasn't for the boxes a parts and familiarity with it Id be lookin for lighter.
Ya I know build the IRS,,,,,
I'd rather do it myself if it's done right or not,,,isn't that what hotrodding is all about?
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Caveman49
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Re: 9'' Rear End

Post by Caveman49 »

I believe your 8” should be plenty. Change out gears maybe, I put a Yukon 3:40 trac loc in our 8”, does fine. Unless you really plan on having a torque monster.
Did you ever contact Doug?
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Joe Travers
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Re: 9'' Rear End

Post by Joe Travers »

SASSY wrote:
Tue Jan 03, 2023 2:13 pm
Plus the weight! I feel that lump throwing the back of the car around when I get on it in the twisties. If it wasn't for the boxes a parts and familiarity with it Id be lookin for lighter.
Ya I know build the IRS,,,,,
Or mount Hoosiers on all fours like Comethead Joe :mrgreen:

Joe
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1963 1/2 Custom Hardtop
342 stroker, solid roller, T-10, 3.55 posi

kcomet67
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Re: 9'' Rear End

Post by kcomet67 »

Sticking with the 8'' it is. Thanks for the input guys. Caveman I did. Talked with him last night, hopefully going to see him this weekend.
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comethead
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Re: 9'' Rear End

Post by comethead »

Joe Travers wrote:
Tue Jan 03, 2023 2:36 pm
SASSY wrote:
Tue Jan 03, 2023 2:13 pm
Plus the weight! I feel that lump throwing the back of the car around when I get on it in the twisties. If it wasn't for the boxes a parts and familiarity with it Id be lookin for lighter.
Ya I know build the IRS,,,,,
Or mount Hoosiers on all fours like Comethead Joe :mrgreen:

Joe
:lol:
Im still running the stock 8 inch in my road racing Falcon with about 300hp. So far so good. I don’t plan on big HP or sticky launches so I’m happy with the lighter 8.

Joe
1965 Caliente HT- 289/4 speed
1964 Falcon HT- track car- 302/4 speed
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vicegrip
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Re: 9'' Rear End

Post by vicegrip »

It would be fun to stick a big inch high power motor in that car.Super sleeper patina fest.

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