67 upgrades for 2011

[my67c20]

I have a 67 C20 with a 383 (450hp, 375tq) with a sm465, 4:56 gears non posi sitting on 16.5 8 luggers. I want to take it the track. Don't want to be that guy that does a burnout sideways and then miss a gear as i am shfting the trans. So i feel it is time to do some upgrades to the drive train.

Budget is about 2k (that the wife knows about)

Which automatic would be the best bang for the buck?
Scale of 1 to 5 how easy of an upgrade?
What year would be best to get a posi and maintain the same rear gear?
Would like to upgrade to a roller cam (older block) yes or no?

I have searched but nothing in one place. Any thoughts. Thanks

[m6z]

A turbo 350 or turbo 400 trans should work just fine at your power level. Put a good shift kit in either and it should be good to go. Don't go cheap on the converter. A cheap converter will eat alot of power.

The posi should be the same for all the years that they used the 12 bolts in these trucks. The only difference is the series 3 or 4. You will need the 4 series which will be found on 3.73 and lower gears. 3.73, 4:10, 4.56 etc.

Edit. Just relized you have a c20. Which rear do you have?

I wouldn't mess with the cam till you get the trans and traction figured out. See how fast you can go with the power you have and then get into the motor.

[my67c20]

I have an HO52 with the 4:56. What is the deal with the Eaton POSI LSD set-up? If i try to decifer the literature i believe they may not be available for these trucks, but not sure. I searched around and i am reading things that if i found a detroit locker it could slip right in i would just need to change axles splines. Any truth to that.

[my67c20]

So for the better part of the morning i have been reading about updating the eaton ho52 with a detroit locker from a 14 bolt ff. Has anyone done this swap and if so do you have pictures and how hard was it?

[special-K]

Why not try to find an HO52 Locker? It was called the No Spin on the SPID.