Your question illustrates EXACTLY why I get on my soapbox and rag people about calling the engines by their correct name.
What you call a "318" is either an LA 318 or a Poly 318 or a 5.2 Magnum. In this case I surmise the engine you want to replace is a 5.2Mag.
Likewise your "360" may be either an LA 360 or a 5.9 Mag.
Even though the engines have the same basic design and displacement (bore and stroke) there are enough differences to make correct nomenclature important.
Whether the 360 in question is a 5.9 Mag or a 360 from the LA line makes a lot of difference.
R.
Yesterday I began to type a similar reply. In the end deleted my thoughts with the assumption that the OP could easily find the info he's looking for with a simple Google search. But since no one else previously mentioned the difference in balancing, the OP should also take note of that.
