Short duration cams/340

I have one of these that I'm debating on running in my 318-

http://www.hughesengines.com/Index/...=heh1019al&searchmode=partnumber&partid=21840

I agree. I'd really like to see what a quick ramp rate and closer duration will do on the street. I like the Hughes cuts, because of the wider lobes and lift rate. They require their own springs. I'm very tempted to run this one in my 318, but I'm not sure how it will affect MPG against a stocker.