Can anyone give me some info???

I'm assuming it was a 6 cylinder. if you use the newer v-8 waterpump housing you may be able to re-use the original radiator if not you'll need one of those. you need to find a early cable shift trans, or at least a case as the 6 trans is the same except for the bellhousing pattern. you'll need to keep your shifter setup. you will need a v-8 wiring loom and gas pedal with linkage. are you planning on going with dual exhaust? I think you'll need the trans cross member to fit the exhaust. if you use single the 6 cyl. cross member will work fine. I'm in southern california and probably have access to everything you would need. I could even come up with a 273 hi-po engine, maybe even the Commando aircleaner, I'd have to check. at one point my Dad had over 20 complete Barracudas ranging from 1964 through 1972.
let me know