Rebuild in progress - can't turn crank?

[Praxiss454]

1965 GMC 1000, rebuilding the 230. Ended up actually needing a new block due to a crack. The new block is cast with a 1968 model year but looks identical.

I have the crank and cam installed. Main bearings torqued to spec (65 ft lbs). Sticky assembly lube on everything (because I don't know any better). I can't turn the crank by hand and I just wanted a sanity check on this before I go any further. Sound right? Bearings are .010 over, new-to-me crank is supposed to be freshly ground to the same by a reputable shop.

I tried putting bolts into the flywheel mounting holes on the crank and turning it with a screwdriver, to no avail. I recall when I was disassembling everything, I had a hard time turning the crank in this fashion as well, but it did move. Now it's not moving. I haven't tried my hardest but was worried about f-ing something up.

All the caps are in order and the arrows are pointing forward.

Tips/suggestions?