I found a 327 +.060 for $40 and a free 30k mile 350. Which one would be best for the 56?
That there is sound advice. The 327 will be worth some cash to someone out there. With it being already bored .060 over that is to much for me. With core shift on the old blocks you really don't know what you have and you could have overheating issues. The 350 is a no brainer as the only differences that could have an effect on you is that the 350 doesn't have the rear draft tube so you'd have to run vented valve covers. However the 350 can have four bolt mains. Other than the small journal mains on the 327 those three things are the difference.For free and $40, I would get both and make up my mind later. Use the other for trade stock or sell for something else. Can't go wrong for that kind of money.
You are correct. I left it out as it seems I can never find one of the large journaled blocks when I need one. Do you know if ALL the later 327's were large journal or was it specific to a certain castings??