Ram Air III engine q's

Hello, I was wondering if someone could please help fill me in on the RAM AIR III engine. I know someone who has it for sale, and I was wondering if it is a good engine to have. I know they are rare, but are they powerful too? If I get it, I plan to put it in my '79 T/A to make people think, oh it's just a '79, but they don't know it's got a RAM AIR III in it. Please let me know about anything on these engines, and where I can get parts for it etc. Thanks!

cool, thanks everybody