You may have replaced the cam a tooth or two off thus upsetting the  
valve timing. Had the same thing happen when a timing belt slipped on  
my Mazda 626.   Sudden loss of power. In your case, if the power loss  
was immediate after replacing the cam bearings and remounting the cam,  
i'd look at cam timing.

On 8-Oct-11, at 6:34 PM, Automatic digest processor wrote:

> Date:    Sat, 8 Oct 2011 07:38:41 -0500
> From:    jon durham <jon_durham@KNOLOGY.NET>
> Subject: Lost Power 85 Vanagon
>
> I had to replace the cam bearings on my 85 Vanagon. The engine lost
> power. When it's cold in winter, I have to race the engine just to get
> it going in first gear.
>
> Thoughts?
> --
> �All that we are is the result of what we have thought. The mind is
> everything. What we think, we become.� Buddha