LA block hunt/search maybe shift to piston hunt

I need another block to finish my projects.
Was trying to hunt down a standard bore 360 maybe 1970-1973, or 1988-91
I find a standard bore 340 down the road on craigslist.
I have a 3.51" (?) yellow steel 1053(?memory) alloy crankshaft sitting in the garage
would pistons be available? chevy pistons? do I have to get connecting rods again?
my cars are F or 73/74 B-bodies (street driven, no track)