1966 mustang fastback ford 427 project - Vintage Mustang Forums

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post #1 of 25 (permalink) Old 12-20-2011, 09:25 PM Thread Starter
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1966 mustang fastback ford 427 project

Hey guys i just bought a 1966 mustang fastback that has no rust with a rebuilt Hi po 289. the cars not done.The motors out of the car but ive got a ford 427 with 500 hp . I just wanted to see from you guys if it would be a good idea to put the 427 in....and if i should reinforce the whole car.... and how much will it cost in resale
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post #2 of 25 (permalink) Old 12-20-2011, 09:29 PM
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I guess the first question would be,"what engine code is the car"
If you've got some numbers matching or even the ' correct' engine for the car then the 427 could hurt resale.

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post #3 of 25 (permalink) Old 12-20-2011, 09:34 PM
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Is it a FE 427? Or a 351w based 427? You'll have to cut the shocktowers to fit a FE engine in the car.

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post #4 of 25 (permalink) Old 12-21-2011, 10:42 PM
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Question 427 in a 65

Nope- shock towers don't need cutting, as it will fit, but no clearance on the sides! You'll need fabricated motor mounts, special exhaust manifolds, etc., as well as linkage. I have a friend in Ft Lauderdale with the only 65 Shelby with a 427 installed by Shelby. Everything to get it to fit was fabricated. He spent 10 years authenticating the car, but there are no modifications to the body or engine compartment. You may find the fabrications will run WAY more than the effort to get it in. Cost effective?

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post #5 of 25 (permalink) Old 12-21-2011, 11:11 PM
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How did they physically fit the FE motor between the shock towers? The small blocks barely fit. Maybe with some custom motor mounts you could lift it up high enough but then it would fit under the hood. I would love to see pictures of this.
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post #6 of 25 (permalink) Old 12-21-2011, 11:34 PM
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Quote:
Originally Posted by miguelito View Post
How did they physically fit the FE motor between the shock towers? The small blocks barely fit. Maybe with some custom motor mounts you could lift it up high enough but then it would fit under the hood. I would love to see pictures of this.
I'd like to see that too. No way a FE fits in without cutting something.

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post #7 of 25 (permalink) Old 12-22-2011, 12:09 AM
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Are you talking about a 351 stroked to a 427? A 351 block is the biggest you can fit in the stock 65-66 front end.


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post #8 of 25 (permalink) Old 12-22-2011, 12:38 AM
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Nope. They fit. Have a friend that had a 2+2 with a 390. No cutting, but you really can't fit much more than a cardboard box top by the shock towers.

289 dimensions 29L x 24W x 27.5H
FE dimensions 32L x 27W x 29H

Measured without carburetor. That's only an inch & a half on each side. Mount it a little high and it will clear.
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post #9 of 25 (permalink) Old 12-22-2011, 02:22 AM
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Still cant picture it unless the engine was sticking well above the hood line. I also cant see the bellhousing having enough room either. I can barely get a business card in between the header flange and the shock tower on my 69 and I've got the engine raised up about a 1/4 inch.

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post #10 of 25 (permalink) Old 12-22-2011, 03:21 AM
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put a set of 68-70 shock towers in it. get a set of headers for a 67-70 bb mustang. it will look as if it came from ford that way. if you want a 427 for go fast build a 351w stroker.
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post #11 of 25 (permalink) Old 12-22-2011, 07:30 AM
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Quote:
Originally Posted by PonyDoc View Post
Nope- shock towers don't need cutting, as it will fit, but no clearance on the sides! You'll need fabricated motor mounts, special exhaust manifolds, etc., as well as linkage. I have a friend in Ft Lauderdale with the only 65 Shelby with a 427 installed by Shelby. Everything to get it to fit was fabricated. He spent 10 years authenticating the car, but there are no modifications to the body or engine compartment. You may find the fabrications will run WAY more than the effort to get it in. Cost effective?
Right,

Had a friend put a 427 425 horse in a 66 in about 70??

Would lay down solid black mark at 60 MPH in 3 gear! Wild ride with all the body twist.

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post #12 of 25 (permalink) Old 12-22-2011, 07:42 AM
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I would need to see pics to believe it..I have seen a 65 mustang with 67-70 style shock towers and a 427 but I say the FE does not fit in the early cars without any cutting..


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post #13 of 25 (permalink) Old 12-23-2011, 11:05 AM
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Even if the engine physically fits what would you do for exhaust? As mentioned, the header flanges barely clear the shock towers on my 68 with a 427.

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post #14 of 25 (permalink) Old 12-23-2011, 12:36 PM
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Quote:
Originally Posted by gerardc View Post
Hey guys i just bought a 1966 mustang fastback that has no rust with a rebuilt Hi po 289. the cars not done.The motors out of the car but ive got a ford 427 with 500 hp . I just wanted to see from you guys if it would be a good idea to put the 427 in....and if i should reinforce the whole car.... and how much will it cost in resale
No it's not a good idea. The effort and money spent if fitting the larger engine would net a car less valuable and poorer driving then one with an equal amount of effort and money spent improving the current configuration.

300hp with an overdrive trans, good brakes and modified suspension would make for a much better car driving experiance.

This is assuming a 427 big or middle block and not a 351 stroker. I don't think these cars need more torque. You can't fit enough tire under them to control wheel spin with a healthy 302. The other effect is placing more weight on the front end which further induces push and helps to break the back end loose sooner. It quickly turns into a mish mosh hodge podge pile of *&^%.

In either case do your research before installing the larger motor.

Sense is not as common as you think.
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post #15 of 25 (permalink) Old 12-23-2011, 01:10 PM
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op said Ford 427 500hp. that sounds like Ford Racing's crate windsor.

how about a 427 SOHC. that would be interesting.

subframe connectors would probably be a good idea. it depends on how hard you're going to hit it with that engine. slicks, launching at 6k, then you may want to consider at least a 6-point.

if your car was a true hi-po fastback then i'm sure some people will be upset. but it's not their car.
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