All B series are interchangable except for the 88-91 preludes. A B-20 is the most powerfull of all if your want a good replacement with no modes, just a drop in. You will have to use your intake manifold assy and exhaust, you could change the valve cover but not realy needed. You pick those up for around $900.00 to $1100.00 best bet for low end torque, and good around HP. Good luck, by the way your engine is trashed please don't take this the wrong way. There are very few good parts left in the short block, bad crank, rods, block, oil pump, main bearing, there will be metal particles everywhere inside that engine. Just remove the oil pan and you will see for yourself. Just replace the whole engine. Must easier and less stress for the future.