While we are on the subject of 383's, other than the heating problems with a 400, why would you build a 383? I have a couple 400's sitting around just dying to be rebuilt. There are two ways to look at a 383 - adding stroke to a 350 or taking bore from a 400. Does one have advantage over the other? Just a thought, any info would be greatly appreciated. thanks eric Hell, it don't really matter....it's just for my race car.