So Ive been getting ready to hit the wrecking yard for a 420a block and was wanting to know your opinions on what to look out for in terms of visually choosing.I was wanting to do a cylinder leakdown test but was wondering if this will work while the engines cold or will it give false reading due to the engine not being warmed up?Any ideas?so far i'm wanting to find at the yard

* low miles.
*originally equipped with auto trans since it shouldnt have as much abuse from over revving and such.
*peferably my donor car should be rear ended or Tboned accident indicating thats why its in the junk yard to begin with.
*If the interior doesnt look as bad as other donor cars this should indicate that the car was better maintained and cared for "just a thought".
*odvious damage or car with damaged front end I'll definitaly stay away from.


anything you guys can throw in there before I go to the yard would be appretiated,Thank you.