360 magnum questions

ok, I picked up a 360 roller mag block out of a 96 ram that I intend to build up for my 75 duster, I also have a set of J heads I want to use for it, can I, also what parts can I use from the 360 la that is in the car now? now I am taking my time with this as I want to build it up good, so right now I think I want to keep it carbureted os I think as long as I use an LA intake the heads should be fine, anything I need to know up front? Thanks in advanced