302 casting potential?

not to resurrect this thread, but are there any other threads on here that have good information on these 302 heads? i remember a guy at a car show telling me that "x heads are junk on smallblocks, 302's are much better" (or was it 308, if there is such a thing?)...i wouldnt mind doing some reading on all these types of heads as there are usually quite a few junker 318's at my local pick and pull that would make great bases for learning porting, or actually putting the heads to good use