Can someone tell me what 12-bolts will bolt up to my 69 K5?

[chevy_muscle]

I'm wondering what donor trucks I can get a 12-bolt from that will bolt right up to my '69 blazer.

I'm looking for a posi rear end and mine is open.


Here's a link to my wanted post: http://coloradok5.com/forums/showthread.php?t=125325

 

[fatbob]

The factory POSI would probably be the gov-loc which does not have a good reputation. Another issue would be to keep the gearing the same in both the front and rear axles. Since you were lucky enough of get an open 12 bolt , you can just buy a lockrite {$220 at jegs}, put it in and your set.

 

[R72K5]

if its 4x4 k5 69-72 then only 72 older 4x4 or any years rear 1 ton axles will fit

69-72 4x4 are 40" spring perch centers

these are 40 centers too:

- 1 tons(C/K-30's) '60`s and up years(k-30 did not exist til 77)
-'69-72 k5's(4x4's only)(all 69's were 4x4)
-68-72 longhorns(C-20 C30 trucks with fleetside bed, these were built on 1 ton chassis)
-'69-70 9 foot steps(these were built on 1 ton chassis also)

shock mounts changed 73-up. but thats no biggie, yank yank

range of ratios you will find under the above models- except 69-72 K5's in which were 3.07/3.73:
3.54-5.13

no gov lok until in the 70s sometime, the 67-72 trucks were good old reliable strong clutch pack limited slip you can still find them around although most all of them are with 3.07 ratio,

dana 60 were powrlok
eaton 52 and 72 and 110 were no-spin i believe

and there was one more posi unit under gm trucks i forgot name and applications, id have to go and look

good lcuk