Victor heads can make a lot of power but they do have some weird quirks to them so you might want to do some research before you buy them. It all depends on how much power you are trying to make, other other parts you have on hand and how big your budget is. I'm not a huge fan of the Victor heads but some people have had good luck with them. I run Indy EZ heads on my 514 and it makes good power so I just stick with it but lots of guys don't like Indy either so I guess it boils down to who or what you like.