Engine swap
1....Why would you use Schumaker mounts going 318--360???
2....What are you doing about the 318--360 balance change? 360 must have a proper 360 front dampener, AND THE PROPER WEIGHTED converter or an AFTERMARKET weighted flex plate
3....If you have the proper crossmember / mount that should "show you" the proper front/ rear engine / trans location. It should not have changed. The water pump shaft lengths should be the same.
Otherwise, as noted above, the proper engine brackets, in the proper place, proper sides