350/350 out, 454/400 in - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bluegoose972 · 06-17-2003, 05:26 PM

Just bought the blazer and I have always wanted a big block, so rather than spend any money on the existing combo, I want to swap it out for the engine I really want.

Looking to swap out my 350/350 combo and install a 454 with a 400 trans. This is going to be on a 71 Blazer 4x4. My understanding is that the 400 is a little longer than the 350. Is there a special adapter that is required in order to keep the transfer case from shifting back?

Who has completed a swap like this?

06-17-2003, 05:26 PM	#1
Bluegoose972 Registered User Join Date: Apr 2003 Location: Lubbock, Texas Posts: 248	350/350 out, 454/400 in Just bought the blazer and I have always wanted a big block, so rather than spend any money on the existing combo, I want to swap it out for the engine I really want. Looking to swap out my 350/350 combo and install a 454 with a 400 trans. This is going to be on a 71 Blazer 4x4. My understanding is that the 400 is a little longer than the 350. Is there a special adapter that is required in order to keep the transfer case from shifting back? Who has completed a swap like this?

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