I've been looking around for a possible replacement for the stuck 272 thats in my '58 SWB and I came across a Y that was supposed to have come out of a school bus. It was in an old shed and I didn't have my camera with me so I dont have any pics to help with the I.D. Anyway, it has the wide holley pattern as well as the ramshorn exhaust but the front of the motor looks different then other y blocks, like it had a taller waterpump casting or something else sticking up in the front. It also had a power steering reservior and the tubing wrapped around the reservior to act as a cooler I guess. I pulled the heads and couldn't find any casting numbers. Any help on what this motor might be  would be appreciated. I might be able to get some pics at a later date.