I have looked at the 528. Aside from being bigger, one other big difference is a higher compression ratio. I have considered buying a current gen 528 to replace this 472 due to lack of confidence that anything about it is right. Also, since Ray Barton has his name on it, I would hope it is the real deal. I have no oil consumption problems. I am glad to know you are happy with yours as to how it runs. Have you ever been to the strip with it? 610hp/650tq is impressive. Is yours a pump gas motor? Thx for the input.