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New engine. Need to switch trans?

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Old Jan 27, 2001 | 12:13 PM
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New engine. Need to switch trans?

I have a 68 T-bird that I'm looking to put a 351W into. The car has a C6 transmission already in it. If I put this engine in the car would I have to switch out the trans?
 
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Old Jan 27, 2001 | 12:33 PM
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New engine. Need to switch trans?

First off, what was the tranny mounted to before?

RCC
 
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Old Jan 27, 2001 | 03:49 PM
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New engine. Need to switch trans?

The factory 429 8cyl engine
 
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Old Jan 27, 2001 | 04:36 PM
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New engine. Need to switch trans?

Different bellhousing pattern. Your best bet is to get a small block c-6, which will bolt up to the 351W. The big block C-6 that's in there now is VERY marketable at swap meets, etc. DON'T just scrap it out.
 
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Old Jan 27, 2001 | 10:01 PM
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New engine. Need to switch trans?

I wanted to try avoid changeing the transmission right away. It's still in good shape
 
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Old Jan 28, 2001 | 07:24 PM
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New engine. Need to switch trans?

What Kind of transmission should I get?
 
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Old Jan 28, 2001 | 09:31 PM
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New engine. Need to switch trans?

A small-block C-6 is your best bet, it would be a direct bolt in. An AOD could be made to fit, but it might not hold up well behind a 351. An E4OD could also be made to fit and would certainly be strong enough, but it requires an electronic controller.
 
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Old Jan 29, 2001 | 10:54 AM
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New engine. Need to switch trans?

or...put a big block back in, 351M, 400M, 460?, etc.

'82 F150 2WD w/351W (orig 300 I6)
Slik
 
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Old Jan 29, 2001 | 08:18 PM
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New engine. Need to switch trans?

Would it make much of a differance if I put in a 351W big or small block? The cars weight is about 4000 lbs and I'm not going to be towing anything. A small block C6 should work in either ease right?
 
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Old Jan 29, 2001 | 08:29 PM
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New engine. Need to switch trans?

a 351w is a small block engine. i'd stick with the 429.
 
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Old Jan 29, 2001 | 08:48 PM
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New engine. Need to switch trans?

The 429 is as expensive to repair then it is to buy another engine not to mention it gets the 8 mpg for stock performance. This car is also driven daily. What kind of trucks come with a 351W?
 
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Old Jan 30, 2001 | 05:36 AM
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New engine. Need to switch trans?

Or does anyone recomend any other big block engine?
 
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Old Jan 30, 2001 | 04:56 PM
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New engine. Need to switch trans?

If you don't like the mileage on a 429, you probably won't like the 460 either, but it's your best bet. 460s are plentiful, give a ton of torque and are a direct bolt in. A fresh one should give you better mileage than you've been experiencing. If you can't or won't stick with the big block engines, that leaves you with the 400M or the 351M, which use the same bolt pattern. Problem is, the motor mounts, etc. are probably not going to work and you'll probably need a trick oil pan. If you weight the cost of conversion against the fuel mileage gains, you may be better off just rebuilding the 429.
 
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Old Jan 31, 2001 | 05:23 AM
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New engine. Need to switch trans?

I'll start looking into the 460 a little . If a 351 gets about 12.5 mpg is it really worth it to put a computer in it? It only saves about 1 mpg right?
 
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Old Jan 31, 2001 | 04:56 PM
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New engine. Need to switch trans?

MPG is really a big variable, depending mostly on how close to the carb your foot stays.
I would suggest a 460. No reason, just more displacement

-Andrew
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Nothing, and I mean nothing, stirs the soul, saying I'm a bad **** like lettin'em rip with a window shaking, fuel gulpin, carbon monoxide belchin, attention gettin, V-oh my LORD!-8!
 
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