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Old 06-11-2008, 11:01 PM
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how to fix a 429 with a cracked block?

Those of you who read my previouse post will recognize that I just recently acquired a 1970 Mercury Cyclone GT...it's orginal engin, 429 4bbl Thunderjet has a cracked block...whats my best alternative(the owner said he tried to re-sleave it but it wouldn't hold)...can I us a 460 block as replacement, do I need to pick up another 429 block, could a reputable person re-sleave or fix the block...I am looking for the best alternative while keeping it as close to original as possible.

Any suggestions would help!! (I am just entering this hobby and don't know a whole lot) Thanks

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Old 06-11-2008, 11:15 PM
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I have ran across 2 other people that have 429 Cyclone Gt's and both had a cracked block. Both had the block resleeved. But it's very odd all I've ran across had a cracked block?
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Old 06-11-2008, 11:18 PM
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I agree with you about keeping it as original as you can. The placement of the crack in the block will help us determine if it is repairable, or not.
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Old 06-11-2008, 11:31 PM
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Quote:
Originally Posted by classicgarage
Those of you who read my previouse post will recognize that I just recently acquired a 1970 Mercury Cyclone GT...it's orginal engin, 429 4bbl Thunderjet has a cracked block...whats my best alternative(the owner said he tried to re-sleave it but it wouldn't hold)...can I us a 460 block as replacement, do I need to pick up another 429 block, could a reputable person re-sleave or fix the block...I am looking for the best alternative while keeping it as close to original as possible.

Any suggestions would help!! (I am just entering this hobby and don't know a whole lot) Thanks
I presume the crack is in a cylinder bore? Or exactly where? Are there any more cracks?

Yes on the 460 block, the only internal difference between the 439 and 460 is stroke.

Bogie
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Old 06-12-2008, 07:51 AM
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Quote:
Originally Posted by classicgarage
Those of you who read my previouse post will recognize that I just recently acquired a 1970 Mercury Cyclone GT...it's orginal engin, 429 4bbl Thunderjet has a cracked block...whats my best alternative(the owner said he tried to re-sleave it but it wouldn't hold)...can I us a 460 block as replacement, do I need to pick up another 429 block, could a reputable person re-sleave or fix the block...I am looking for the best alternative while keeping it as close to original as possible.

Any suggestions would help!! (I am just entering this hobby and don't know a whole lot) Thanks
429 and 460 blocks are indentcal the only diff is the stroke .
As cheap as 460 blocks are I wouldn't waste my time fixing a cracked block. Any time you go this deep in to a motor you would do a rebuild so it's a good bet that the pistons are gone . So that being said pull the pistons and crank from the 429 and drop them in to the 460 block (with proper sizing , rings, etc) and you have a 429.
I did this 2years ago only I went the other way 460 crank & pistons into a 429 block to go in to a mud truck.

Good Luck
Kenny
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Old 06-12-2008, 08:37 AM
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I would just get a replacement 429 or 460 block unless you have a four bolt main CJ block. There is nothing special about a 429 Thunderjet besides the name and having a four barrel carb.
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Old 06-12-2008, 08:39 AM
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If all else fails Ford performance has those parts...

Sam
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Old 06-12-2008, 09:38 AM
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OK, I'm not a Ford guy so school me. I thought the big engine in '70 was an FE engine and a 460 was the late mode more conventional head design style. Did they make both FEs and the later style in '70? Did they make a 460FE? Ford really got a lot of mileage out of that anchor - 332, 352, 360, 361, 390, 391, 406, 410, 427, 428. The Wikipedia FE article does not list an FE larger than a 428.

Incidentally, Wikipedia also claims the infamous FE 427 actually displaced 425cuin but got the 427 moniker due to that being the NASCAR max displacement regulation.
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Old 06-12-2008, 11:02 AM
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don't know about what yr on the fe, but the first yr for the 385 series, was 68 -460 in lincoln. may have been in others. completely different eng family.
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Old 06-12-2008, 11:11 AM
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Hi,
Wikipedia Fords 385 engine.
Rich
http://en.wikipedia.org/wiki/Ford_385_engine
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Old 06-12-2008, 01:01 PM
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So the '352' was the big block and Windsor and Cleveland were small blocks? Why have two different small block designs?
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Old 06-12-2008, 02:02 PM
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The FE stood for Ford Engine which is a big block, The FT stood for Ford Truck which was a FE that was designed for big trucks. The 370-429-460 are apart of the 385 engine series which are big blocks. The Windsor's the 289, 302, 351W are small blocks. The 351M-400 and 351C are apart of the 335 engines series. They are neither a big block or small block, more of a mid sized block. The 460 was designed as a replacement for the 462 MEL series of engines in the Lincoln Division. What I find interesting is that the designer of the 429-460 is the same guy who designed the Chevrolet 396-427-454 engines. Ford snagged this guy, Knudson and Shinoda from Chevrolet about the same time they fired Iaccoa.
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Old 06-12-2008, 05:17 PM
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Hi,
Ford was unable to keep up with 351w demand, so they started another line made in Cleveland Ohio, this is where the GM guy made his mark, the canted
valve arrangement 351 Cleveland, also the 302 isn't a Windsor, there made in Clevland Ohio.
Rich
PS Windsor Canada, across the river from Detroit.

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Old 06-12-2008, 05:46 PM
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Quote:
Originally Posted by willys36@aol.com
So the '352' was the big block and Windsor and Cleveland were small blocks? Why have two different small block designs?
The FE actually came as small as 332 ci. 332, 352, 360 (truck), 361 (Edsel), 390, 406, 410, 427, and 428. The 427 was the base for the "side oiler" and the cammer (SOHC).
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