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03-21-2010, 11:14 PM
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Registered User
Join Date: Feb 2010
Location: Poulsbo, wa
Posts: 42
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454to a TH350
Okay the truck had a 427 in it but it was a junk motor constructed from several motors and it was frozen up, the heads didn't even match each other. A guy wanted the block regardless and swapped me a 454 for the 427. The 454 is built up and dynoed at 450HP.
The question is what do I need to do to the TH350 to help it hold the 454? I would love to change it out to a 400 but I have the NP205 transfer case and every TH400 with a transfer case I have seen looks like it has the front shaft on the left side while my 73 has the front shaft on the right side. What is the best way to go?
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07 Chev 2500HD Classic Project Ranch Hand, Hauling A$$ since 1973  I was told this Project had a L-72 427 425HP, It did not. It does have a 427 block and parts from various 427 motors. It will end up with a nice strong 454 in the end. It has not been run for 20+ years Frame up restoration started2/15/2010 
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