I have 304's in my engine....
had them with 45's and they made power between 5.5k-7.5k but almost seamed like too much carb for a 304.
then I ran them with my class mandated 38/38 and it ran even better than before I swear!
so I would say they are ideal for DCOE 40,42mm. 45,48mm DCOE better suited for 316 and 336 cams
I would also say you can you them to good effect with a 38/38 it does help that my head is ported as well....
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68' 1602
98' ///M3 Sedan
88' ///M3 Sold *
06' ///M3 Competition Pkg Sold *
http://www.bmw1602.com/