Efi 429
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Hotshot
Joined: Dec 2003
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From: iowa
Welcome to FTE Kris.
If you decide to take the EFI off a later model 460 you will need the heads also, as the carbed heads and EFI manifolds don't match up. I am sure someone has actually done that swap but I personally haven't. But I do know that if our going to do it, you need to find a donor truck and take everything all the wiring harnesses computor etc.
If you decide to take the EFI off a later model 460 you will need the heads also, as the carbed heads and EFI manifolds don't match up. I am sure someone has actually done that swap but I personally haven't. But I do know that if our going to do it, you need to find a donor truck and take everything all the wiring harnesses computor etc.
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Junior User
Joined: Jul 2006
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Thanks guys!! I did a EFI conv. on my 67 Bronco 5.8L it is fun. I think what I am mostly wondering about is if the 429 would run better than the 460? I have always heard the 429 will walk all over a 460?
Senior User
Joined: Feb 2006
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That common conception has more to do with vintage than with the displacment; i.e. the 429s went out of production before the 460s got detuned and smogged to death like every other engine that remained in produuction beyone '71. If you wanted to compare the 429 and 460(Lincoln) in the same model year..let's pick 1971 - a year they were both 'HP' high-compression engines and both in production at the same time :
The 429 Thunderjet 4V made 360 HP and the 460 made 365 HP. Stands to reason..the 460 has more displacement and longer stroke
If you go and put the late-model 460 EFI heads on the 429, you will have lost a lot of what made it roar and might as well have stayed 460 for the longer stroke and worked with that instead.
Or you could 'roll yr own' EFI for the 429, keeping the stock C8 or D0VE heads and there are lots of ways to do that too.
The 429 Thunderjet 4V made 360 HP and the 460 made 365 HP. Stands to reason..the 460 has more displacement and longer stroke
If you go and put the late-model 460 EFI heads on the 429, you will have lost a lot of what made it roar and might as well have stayed 460 for the longer stroke and worked with that instead.
Or you could 'roll yr own' EFI for the 429, keeping the stock C8 or D0VE heads and there are lots of ways to do that too.
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Junior User
Joined: Jul 2006
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would it be possible to buy a 429 carb intake with injector bosses and adapt the 460 TB to it or even port the stock 460 intake to match the 429 heads? Also what did you have in mind for my own EFI setup?
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Cargo Master
Joined: Dec 2003
Posts: 2,734
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From: Sunny Florida
I think you can buy the little bosses for the injectors to weld on the intake that doesn't have them.
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Postmaster
Joined: Apr 2003
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From: Virginia Beach
I see 'em on Ebay all the time, set of 8 for like $30-$50. Don't remember if there steel or aluminum though 
Something else, if your going with a stock 460 EFI setup you'll have speed-density, which might not like the change in displacement. . .if your going to "roll your own" you could grab all the speed-density stuff needed to git 'er runnin', then do a Mass Air conversion on it to make it nice and mod friendly. . .or you could do the GM throttle body setup, or go full after market
. . .If I could make anyless sense, just holler
Something else, if your going with a stock 460 EFI setup you'll have speed-density, which might not like the change in displacement. . .if your going to "roll your own" you could grab all the speed-density stuff needed to git 'er runnin', then do a Mass Air conversion on it to make it nice and mod friendly. . .or you could do the GM throttle body setup, or go full after market
. . .If I could make anyless sense, just holler
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Junior User
Joined: Jul 2006
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I will most likely start out with the speed density. My Bronco still has it and it seems to do alright. If I can find a whole donor truck I will prob stay with the 460 I imagine it would have more than enough power for what I do. The 360 that is in it now has enough power I just can't get use to the doggyness of it. And the EFI is real nice in the winter.