I have a 66 396 that I have always had trouble with but wanted to keep in my car just due to saying numbers matching. I rebuild that thing bored big cam roller rockers and so on. So here my issue it's a as I told a late 65 early 66 motor and since I have all the new stuff on it I would like to use. The motor ran pretty good once installed but then I ran up a stump with sickness, jobs and just life I let it sit in my garage and thought I drained the water out of the rad, and block but that winter even in my gargle got could enough to push 2freeze plugs out. So to present time got fired back up but it seemed to turn slow so I got new starter still slow, so pulled dip stick and I have water. So here's my question would yaw just start all over with a complete setup such as a newer big block which my stuff I have now will not work or find a block and put my stuff in? Or another thought get my block tested before anything and see if it is cracked or not?