Mechanical Fuel Pump.

I am looking for a mechanical fuel pump capable of supplying enough fuel to support 650hp

So far I have found these 2 pumps that are decently priced.

Has anyone had any experience with either of these or can recommend another?

I have read good reviews on this pump.
http://www.claysmithcams.com/mopar-a...lock-chrysler/

Also seen good reviews on the RobBmc, they will make me one to suit.
http://www.robbmcperformance.com/products.html