I spun cam bearings and need to rebuild. Do I need to have any work done to the block if the cylinders look fine? I am on a pretty slim budget and am thinking about rebuilding it myself.

 

Take it apart and have a machine shop check every thing. You might get by with just freshing up the block but without having everything checked for tolerances is just a crap shoot.

 

You might get away with just a honing ... but like pizzi-man said, have the rest checked.
It's going to have to be tanked to replace the cam bearings anyhow.

 

Okay, if I am going to have to have block work done anyway, and am buying a new crank anyway, and a new cam anyway, is there any reason I wouldn't want to do a 383 with stock heads for now? I know that stock heads aren't great for a 383 and I would upgrade the heads in a year or so. How would a 383 with stock heads do compared to a 355 with stock heads?

 

wont be that bad, it will still make power

 

Any idea how much more than stock? Any drivability issues?

 

depends on what size cam you would be going with