12 BOLT SWAPP

[85blazer350]

I just found out my 10 bolt rear end is goners ,but i found a parts truck for sale its an 81 k10 on propane with 12 bolt rear end .I was just wondering what all I would have to do to swapp it into my 85 k5 blazer or will it just go straight in and also would the front end go in and one more thing what would be the best gears for 35 mud kings for both power and fuel economy.

 

[Pugsley]

The 12 bolt will go right in - I just acquired one yesterday myself

For gears, if you've got a 700R4, nothing less than 4.10's with 35s. If you've got the SM465 3.73's would be great.

Clean up on aisle 3!!
<a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>

 

[mudhog]

12bolt is a direct bolt in and i would go with 4:10's with 35in tires

wheeling videoshttp://community.webshots.com/user/ssmith6333

 

[84_Chevy_K10]

If you've got a 700R4, I'd want 4.56s with 35s. I have 4.10s and 35s and I always wish I had just a little more gear.

I am swapping in an SM 465 so now I don't care.

Tim
'84 Chevy K10, lifted, loud, fast, and 3/4 ton axles

 

[mudhog]

i would and will be going with 4:56's with my 36in tire sm465 combo but i suggested 4:10's because he wants to keep good gas milage

wheeling videoshttp://community.webshots.com/user/ssmith6333

 

[arq]

interesting, 4.10 or 3.73s which would be better with 35s and a sm465, how bout a th350??. I'll be upgrading to 35 in the near future and am considering 3.73s with 35 and a th350.
what do you guys think??

ARQ.



1-72 4x4 CST Blazer
2-71 4x4 CST Blazer

 

[Pugsley]

To me 3.73's would be ideal with anything non-overdrive. You'd only need lower for really hardcore rock crawling.

Clean up on aisle 3!!
<a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>

 

[walt88]

I have 700r4-373's with 35's and it is pretty bad. I wish I had AT LEAST 4.10's

35" All-Terrains... I don't get it.

 

[walt88]

I have 700r4-373's with 35's and it is pretty bad. I wish I had AT LEAST 4.10's

35" All-Terrains... I don't get it.

 

[Mreetz]

I've got 3.73s with 35x12.5s. Runs really nice. Its a daily driver so its nice to be able to keep up with everyone on the freeway.

1984 K-5
4" lift
35x12.5 MTs
buildin a 400 for it, any info greatly appreciated