429 to 500 engine swap??? (Full Version)

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429 to 500 engine swap???

  

therealozz -> 429 to 500 engine swap??? (4/27/2008 2:01:32 PM)

    Heres the deal I have a 67 cadillac deville the car is a full custom show car, except the engine the engine thats in the car is a 429,this engine is original I can feel its getting weak!! What I have is 2 cadillac eldorados a 72 and a 75 each one of them are 500ci... Is there alot fab that needs to take place to make a 500 fit in this car if so what is it and also I will have one of these motors rebuilt there both in the same shape...What year is the better year for the 500s 72 or 75??????


                                   Thanks Jesse Osborne


[image]local://upfiles/5905/F11A9D5CCCB64CB4BF6C0507F686B50E.jpg[/image]

  
NAFTA -> RE: 429 to 500 engine swap??? (4/27/2008 3:12:50 PM)

im just curious how much miles to the gallon those 500's get ...

G.A.R.Y. -> RE: 429 to 500 engine swap??? (4/28/2008 1:56:35 PM)

On the big 75 or 76 you will get somewhere between 12 and 16 depending how you drive her, that's from memory from many years ago.

I don't know if there was a better year for the 500, as I remember one was just like the other from year to year, not 100% on that, but I would use the best of the 2, not sure about the mods, slowroll or one of the other guys may know.

therealozz -> RE: 429 to 500 engine swap??? (4/28/2008 7:18:48 PM)

    Heres the deal I have a 67 cadillac deville the car is a full custom show car, except the engine the engine thats in the car is a 429,this engine is original I can feel its getting weak!! What I have is 2 cadillac eldorados a 72 and a 75 each one of them are 500ci... Is there alot fab that needs to take place to make a 500 fit in this car if so what is it and also I will have one of these motors rebuilt there both in the same shape...What year is the better year for the 500s 72 or 75??????


                                   Thanks Jesse Osborne



Thumbnail Image


[image]local://upfiles/5905/48F0644E72324BCB8A65CE95BF1BE222.jpg[/image]

slowroll -> RE: 429 to 500 engine swap??? (4/28/2008 7:42:52 PM)

500 should be a relatively easy swap, your will need to change oil pan and oil pump pick up, transfer exhaust manifolds, and accessory brackets. There are several sites specializing in Cadillac 472/500 engines. Engines pretty much equal 1975 will have HEI.

  

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