Yes, I can remember the 70s. They're gone, sadly...along with the youth I enjoyed back then. I can also remember the 50s, 60s, etc. If your cylinders are approaching .090" over, I'd say that block could only be re-sleeved if you for some sentimental reason want to save it or as you said used as a boat anchor. Think $$$ as Jerry said.
If you can find a late model (1959 and newer) 235 in decent condition for $400 to $600...decent condition meaning never re-bored or only bored out no more than .030" over, I'd get it, check for excessive bore taper, if none bore/hone it to .040" matching all work to new pistons that you give the machinist and make certain the machinist follows OEM specs to the dot (including ring gap), tidy up the crank and get all new bearings, do the head/valves, maybe get a new oil pump and be done. If it has hydraulic lifters, just remove them, carefully note which hole each came from, clean them up well, replace them in the same bores and re-use the camshaft with a new timing gear.
That's what I'd do anyhow. Good luck!
