A little background on how I got my heads. I traded a set of never used early W2s and a couple hundred bucks for the w7s at Indy meet. I picked up the W2s from a craigslist ad for $300. Had to drive 15 minutes to get them. So, I don't have much in the W7s yet. I will probably lose the 3/8 guides and use 11/32 or 5/16, depending on what valves I find. Thinking 2.1 or 2.125 intakes. And Yes Yellow Rose, 50 degree seats. These will be overkill for me, not sure what they will go in, but I will drive it a lot. Ritter told me that the 7s did not have the porosity problems that the 5s had, and he knew the guy I got them from and said they would be good so I made the trade. This will be a while before its built, I want to get a motor in the sweptline first. I miss driving it. I would really like to put the W7s in my 68 Valiant or my gutted 72 Duster. Both cars are in rough shape, but so am I.