Yep, 3/4 ton crossmember will work just fine, they are a wee bit thicker, but identical otherwise.
I might have the one from my 80 when I swapped a blazer tank into it using the factory blazer brackets (didn't work well, the tank sat at an angle) if you need it in a hurry.
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)
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