I've got a 2 bolt 350 casting number 3970010 that I'd be willing to sell you. It's bored .030 over, and doesn't seem to have had many mile on before it died, so it may be cleaned up with a .040 overbore (otherwise a .060 bore will do the job). It had main bearing failure, but no bearings spun. I'll also throw in a crank (may not be salvagable), some 33882 heads, rods (you should probably have them reconditioned), and pistons (probably not much use to you), all for $350. There is a cam in there of unknown lift, but you might be able to make use of it. I will not include the lifters, because I didn't keep track of where they came from.