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Discussion Starter · #1 ·
Hey, i'm looking at getting rid of the 425 in my 79 and was wondering what would drop in? and im not sure what trans is in the car all i know is its the orginal one that came with the car. Thanks alot.
 

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The trans is a BOP pattern TH400 three speed. Any Cadillac big block will drop in. 500/472/425/368...
 

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Discussion Starter · #3 ·
thanks mayne.

What all would have to be done to drop a 350 in? just motor mounts?
 

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Discussion Starter · #5 ·
Originally posted by duck@Feb 21 2010, 10:22 PM~16684228
motor any trans if going chevy
thanks :cool:
 

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Discussion Starter · #8 ·
Originally posted by 64 CRAWLING@Feb 22 2010, 08:38 PM~16693752
i took my 425 out and bolted a 350 olds in there
did you have to change the motor mounts? or was it a direct bolt up
 

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Originally posted by FREAKNET6@Feb 23 2010, 03:33 AM~16697561
did you have to change the motor mounts? or was it a direct bolt up
olds 350 will bolt right in and mount up to trans im looking 4 a motor 4 my 79 caddie mine started to knock , the cheapest rebuild kit i found was a 1g , so im looking too , my neighbor offered me a olds 350 that came in his 78 seville but it needs a rebuild on it but it would be alot cheaper to rebuild the olds ,than the caddie .
 

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Discussion Starter · #11 ·
Originally posted by jdc68chevy@Feb 23 2010, 04:36 PM~16702841
olds 350 will bolt right in and mount up to trans im looking 4 a motor 4  my 79 caddie mine started to knock , the cheapest rebuild kit i found was a 1g , so im looking too , my neighbor offered me a olds 350 that came in his 78 seville but it needs a rebuild on it but it would be alot cheaper to rebuild the olds ,than the caddie .
have you checked craigslist? theres a ton on there around here
 

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Originally posted by FREAKNET6@Feb 23 2010, 05:11 PM~16703221
have you checked craigslist? theres a ton on there around here
ive found some here in the south ,425s i kinda wanted to keep it O/G but they did come with olds motors in them in the late 70s , if it had an olds in it , it probably would be still running rite :mad: , i just got every thing i needed for this car inside & out !!!!!! now here goes the dam motor :mad: :mad: :mad: !!!!!!!!!!!
 

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Discussion Starter · #13 ·
Originally posted by jdc68chevy@Feb 23 2010, 05:33 PM~16703457
ive found some here in the south ,425s i kinda wanted to keep it O/G but they did come with olds motors in them in the late 70s , if it had an olds in it , it probably would be still running rite  :mad: , i just got every thing i needed for this car inside & out !!!!!! now here goes the dam motor  :mad:  :mad:  :mad: !!!!!!!!!!!
i know the feeling id keep the motor but it rolled over 300k on the trip home dunno if its true miles or not im not going test it though lol it still starts and runs just fine though
 

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Originally posted by crucialjp@Feb 24 2010, 07:08 AM~16709595
Got a 472 in mine  :biggrin:  Do that or a 500 it will drop right in  :thumbsup:
I FOUND A 472 COMPLETE WITH TRANNY ON CRAIGSLIST HERE IN GA ,BUT I NEED SOME THING THAT WILL BOLT UP TO MY STOCK TRANS , IT WAS REBUILT 1 1/2 YRS AGO ,I JUST CANT KICK IT TO THE CURB LIKE THAT ;)
 

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472 will bolt up to your thm400.
you will just need the sump and pick up tube from your 425
472 and 500 in RWD 68-76 caddy will have front sump.
but yours 425 RWD is middle sump.
this is no big deal.
 
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