crankshaft help

Ok guys, here the deal, i have always ran bigblocks, but now i have a 67 barracuda that im going to equipt with a small block, my good friend (and also my machinist), have given me a 340 block, that has a fresh 030 overbore, and a set of 340 x heads, (fresh rebuild),now heres the question, he states(my machinist-- which by the way is prone to chevys, and fords i think), anyway, he thinks that small block crankshafts ( 318,340 ) where externally balanced, and i told him i didnt think so, now i know from past experance, 360's were externally balanced, however, i believe that the other small blocks were internally balanced, now i have one other question, if im correct (which i may or maynot), 340 had steel cranks until 1972, is this correct? The reason i ask this is because i need a crankshaft, now this motor isnt going to be nuts, thats what my 68 is for, this is a daily driver (more or less), but i am going to be in the 350-400 hp, now do i really need a steel crank, or can i get by with cast? Any opinions will be appreciated, EXCEPT negative ones, keep those to yourself, please,


Thanks in advance guys,
Author: admin