Vin trouble

Yes it's garbage, original owner said it had a slant 6, I dropped in a 360 and 727 and it broke the ring and pinion on the first test drive.. Currently installing the 9 1/2 from my scrap ram1500, I don't mind 2 different bolt patterns
Why are you surprised by that? The 7ΒΌ" rear end couldn't handle a 360 if you pulled four plug wires.