Small block to Big Block Change Over

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Old 09-19-2012, 03:04 PM
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Small block to Big Block Change Over

I have a 74duster with a 318 SB and am concidering going to a 383 or 440 with a 727 Trans........ What troubles will I face with the motor fitting , The Trans and putting Headers on also....... I also have power steering so need to know if the one off the 318 will work also......Someone said that I might have to change the K Member but they wasnt sure...... I could use your Help !!!!!!

Thx in Advance...........
Old 09-19-2012, 04:47 PM
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It is doable. Need motor mounts from Shumacher , new radiator, BB 727 trans, drive shaft, maybe the rear end ? all the misc eng brackets. Power steering is the same regardless of engine. Headers - VERY close fit A late 400 would be a better fit
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DUSTERforLIFE (09-19-2012)
Old 09-19-2012, 06:23 PM
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Thanks, but do u know if the k member has to be replaced as well ????? Thanks for the info
Old 09-19-2012, 09:12 PM
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Originally Posted by DUSTERforLIFE
Thanks, but do u know if the k member has to be replaced as well ????? Thanks for the info
Tvlynn is right on what you need, you can use the same k-member with the Schumacher motor mounts plus their torque strap is a good idea. Check the trunk floor for rust above the spring perches, dusters like to rust there. I have seen the springs come right thru the trunk floor!

Have fun! john
Old 09-19-2012, 09:41 PM
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Most of the time you can use it as is. Sometimes it may be necessary to trim the K member and box it in for oil pump / oil pan clearance.
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