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Re: 4x4 1970 blazer big block conversion
Most every BB into a blazer I have seen has had firewall modifications. The valve covers typically hit so something must be done. The reason for this I have been told is that GM set the engine and trans further back (1 1/2" or so) to clear the front axle. Three solutions would be hammer the firewall, move the engine forward and install a spring lift or install a body lift.
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The Good:
- 72 GMC Jimmy 4x4 - 307 cid / 350 th
- 70 Chevy Suburban 1/2T 2wd - 454 cid /400 th
- 96 Chevy Impala SS - mainly stock
- 98 Chevy Tahoe LT 4x4 - all stock
The Bad:
- 86 Chevy Suburban 1/2T 4x4 - winter beater
The Ugly:
- 72 Chevy Suburban 1/2T 2wd - parts truck
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