I don't know how many times I've heard that the 7.3 is a copy of the LS engine. I'd like to know what it is that makes it a copy and what the LS has that is exclusive to itself and this engine. I'm not saying that there aren't any similarities but what are they and what does the LS have that no other engine except this one have.
The original small block Chevy engines had the middle two exhaust ports very close to each other and the LS doesn't. Could it be said that the LS copied other manufacturers head designs. The way I look at it they all build off of each other.