Well, it depends on your location and feelings. IMO, they have an unknown block core, two crank cores (the cast is not original), and a set of heads. That's a lot of coin IMO for wht you're getting. I just bought an entire '72 cast crank 340, never been apart, complete intake to pan w/the exh manifolds for $500 with the convertor for the cast crank. So I might say keep looking. You have a rebuild budget around $3K for a stock type rebuild that would give you 350hp. Add another $1K for a performance build with more potential. Look for oily std bore blocks. If it's rusty, you never know why it was pulled and left. Rebuilt shortblocks get between $500-$1K around here depending on the year. I wouldnt pay more than $300 for the parts you list in that shape.