LC, I really like your vintage small block build. Looking forward to the rest of your build. Thanks for posting!
On a completely different subject, today as we were preparing to head South in the morning, I took the time to go out and look at an old Industrial Hemi I bought sight unseen a few months ago. It's been sitting out in the weather and may be ruined, but got it so cheap (40 bucks!) had to take a flyer on it. The carb butterfly was stuck closed and packed tightly with dirt, so I dug it out and with a little oil and a gently persuasive brass hammer got the butterfly open, then poured a gallon of oil down into the intake and hopefully the cylinders. Poured another gallon into every other orifice, then covered the carb with one of the plastic jugs and tarped it. The 56-A should be a 354. Worst case scenario, if it's completely unusable, just paint it up and set it by the shop to look cool.
One cool thing about this era engine. Super thick cylinder walls. So even if you had to bust the pistons to get it apart there'd still be plenty of material to machine
Honestly this lil mini discussion may have helped me out lol. Was talking to someone about a junk 57 283 short block that is junk because it sat heads off in an area with a lot of moisture. I may rear it down and send the block off to be checked. May still be a viable block lol