See, this is what kinda ticks me off. I love the 360 just as much as the next guy. The longer stroke makes it a superior street engine. However, just strolling down to your local junkyard and pulling a 360 out of a 70's, or even 80's whatever, just isnt an option anymore. The sad truth of the matter is that there ISNT anything older than mid 90's in the wrecking yards anymore. Its gotten to the point where older vehicles are worth more in scrap value than they are in parts value, and yard owners cant afford to have a bunch of old junk sitting around taking up space where they could have a 2003 impala or whatever.
Around here, you literally have to buy a CAR to the engine, and then scrap the car, provided you can actually find one with a 360 in it.
Im going through this right now myself. Im almost being forced to build a 318, because its what i already have. Not that i really mind that, I happen to like the short stroke of the 273/318/340 engines.
Not everybody will agree with me here though. Ive got a good friend who is giving me hell about building a 318. He keeps saying "Oh, Id NEVER build a 318 when you can build a 360 for the same price". My response to him is "Find me a buildable 360, and ill build one". He has yet to be able to deliver on that one.
Build what you can get your hands on. With the right parts, none of them are going to be slow. Not even the lowly 318!:D