4speedTerror, I was thinking the same thing....I love mine, they work great (even if they are FORD) The CFM issue is a big one, you have to make sure they're big enough...I ran an aluminum radiator in a big block with one 16" electric fan, and it did not cool enough... you need the CFM's to do the job. How do you like the 496?? Im building one right now, the block is being machined as we speak, and the heads are going to the shop later this week for bigger valves.