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post #1 of 7 (permalink) Old 01-14-2019, 07:56 AM Thread Starter
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429 cj performance help

Hey guys, i have a 429 cj from a 70 Ford Torino in my 67 mustang and i am wondering if there are any ways that i can get more power for a reasonable price. Im only 17 so price is a bit of a concern at the moment because i dont have a very good job and not enough time to work that job with school. If yall could help me out that would be great. Thank you!!
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post #2 of 7 (permalink) Old 01-14-2019, 09:20 AM
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Re: 429 cj performance help

What is a reasonable price to you, and what is the range of more power you're wanting? Is it a stock engine, or has it had some mods when swapped into the Mustang? That is a big engine in a little car, do you really need more power? What rear gears are you running?

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670 Street Avenger, Edlebrock Performer intake, Comp XE262H, Flowtech Headers
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post #3 of 7 (permalink) Old 01-14-2019, 10:36 AM Thread Starter
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Re: 429 cj performance help

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Originally Posted by 70XL View Post
What is a reasonable price to you, and what is the range of more power you're wanting? Is it a stock engine, or has it had some mods when swapped into the Mustang? That is a big engine in a little car, do you really need more power? What rear gears are you running?
A reasonable price to me is around 3 grand. It is a stock engine but it has been rebuilt a few hundred miles ago. Im just looking for more power in general and i have a c6 trans in it right now. I probably dont need more power but if im going to be upgrading everything i might as well go big or go home lol
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post #4 of 7 (permalink) Old 01-14-2019, 11:41 AM
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Re: 429 cj performance help

Do not focus on that ONE key part. Build a combination. If EVERYTHING is stock...

How does the engine fit in there? That's a TIGHT squeeze. I would recommend headers, but they won't be easy... especially for someone who doesn't have a lot of experience installing things that don't usually fit right, and are a PAIN to install. Crites offers them at a decent price, in case you are interested.

Specialty Auto Parts For Sale - Crites Performance Parts - critesperformanceparts.com

Ford Powertrain offers a 'shorty' set, which would probably be a LOT easier to install, and still work great!
Ford Powertrain Applications

Next would be traction and gearing. If you installed an aftermarket cam, you'd need an aftermarket torque converter. As for a gear, it depends on how much street driving you have planned. If the car will be used on the highway a lot, I'd go with a 3.50 to 3.70 if it will be in town, and a 3.25 if you need to do much interstate. Some sort of traction bars will also be needed... along with a limited slip differential, or maybe even a Detroit Locker.
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post #5 of 7 (permalink) Old 01-14-2019, 11:49 AM Thread Starter
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Re: 429 cj performance help

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Originally Posted by n2omike View Post
Do not focus on that ONE key part. Build a combination. If EVERYTHING is stock...

How does the engine fit in there? That's a TIGHT squeeze. I would recommend headers, but they won't be easy... especially for someone who doesn't have a lot of experience installing things that don't usually fit right, and are a PAIN to install. Crites offers them at a decent price, in case you are interested.

Specialty Auto Parts For Sale - Crites Performance Parts - critesperformanceparts.com

Ford Powertrain offers a 'shorty' set, which would probably be a LOT easier to install, and still work great!
Ford Powertrain Applications

Next would be traction and gearing. If you installed an aftermarket cam, you'd need an aftermarket torque converter. As for a gear, it depends on how much street driving you have planned. If the car will be used on the highway a lot, I'd go with a 3.50 to 3.70 if it will be in town, and a 3.25 if you need to do much interstate. Some sort of traction bars will also be needed... along with a limited slip differential, or maybe even a Detroit Locker.
I totally forgot about the cam, they guy who i got it from a while ago said that he put in a thumper or loping cam in it. And with the headers i was thinking about a 3.5 inch pipe... would that be too big or?
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post #6 of 7 (permalink) Old 01-14-2019, 02:34 PM
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Re: 429 cj performance help

Most conversions like you have use headers from sources like n2omike has noted. If you don' have them already , get them. Since you think it has a cam already, the SCJ iron intake is good but there is more power in a Weiand stealth manifold bu they put the carb close to the hood. Beyond that "I" would look to add cubic inches by a 460 or larger short block . But that would go over your budget.
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post #7 of 7 (permalink) Old 01-14-2019, 05:08 PM
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Re: 429 cj performance help

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Originally Posted by That_mustang View Post
I totally forgot about the cam, they guy who i got it from a while ago said that he put in a thumper or loping cam in it. And with the headers i was thinking about a 3.5 inch pipe... would that be too big or?
A good 10" converter and headers with a 3" exhaust would be good additions.
What gear is in the car now? If it doesn't have some sort of limited slip or traction bars, you'll definitely need those.

With the big engine, you won't need a ton of gear. What I recommended in the previous post should be fine.

The Weiand Stealth intake that was mentioned would be a good choice, and will take a lot of weight off the front end. As was said, check hood clearance.

If you've still got money burning a hole in your pocket, you may want to investigate the ignition. If it's not electronic already, a MSD unit would be a good upgrade. Make sure to get a good advance curve. If you buy a new MSD Billet distributor, the last one I bought had the stiffest springs and smallest bushing. Lots of room for improvement with lighter springs, etc.

But, first mods... Exhaust, torque converter, rear end gears, and traction. Those will get the most 'bang for the buck'. Dual 3" should be plenty.

Good Luck
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