273 and 318 the same block?

Not to drastically change the subject, but isn't the Mopar Performance Crate 360 still available? For all the coin in machine work and porting, I think you can get a crate 360 that will do what you need it to do rather cost effectively. Unless you have your own machine shop and want to experiment, it wont be cost effective to try and push a 273/318 out to 340/360 performance range. I can understand the shortage of 340's, and the interest in "making" a 340 out of a 318, but I remember in the early 90's 340's were sought after and weren't cheap even then. I just don't think making one is really cheaper than a MP crate deal. I may be wrong though.