identify the year of my 360 long block

My take on what the OP was looking for was "bolt-on" parts to increase performance. Sure, most small block stuff will physically bolt on, but, if you're looking for performance, you need to take all the specs in consideration. Taking off 360 parts and installing 318 parts usually will usually make performance suffer. You have to take those specs into consideration and have them match the other parts you plan to use if you want things to play nice together.