http://www.mortec.com/journal.htm
(look at the lower chart)
Gen.I, "Small Journal"
265...Mains-2.30"-Rods-2.00"
283...Mains-2.30"-Rods-2.00"
302...Mains-2.30"-Rods-2.00"
327...Mains-2.30"-Rods-2.00"
Gen.I, "Medium Journal", includes "Vortec" 305 and 350 thru '98
262...Mains-2.45"-Rods-2.10"
267...Mains-2.45"-Rods-2.10"
302...Mains-2.45"-Rods-2.10"
305...Mains-2.45"-Rods-2.10"
307...Mains-2.45"-Rods-2.10"
327...Mains-2.45"-Rods-2.10"
350...Mains-2.45"-Rods-2.10"
Gen.I, "Large Journal"
400...Mains-2.65"-rods-2.10"
BTW, , on BIG BLOCKS the oil pumps and oil filter adapters are different due to the block oil filter recess and rear seals being different
if your using an INTERNALLY BALANCED crank and rotating assembly the damper and flywheel or flex-plate are at least in theory neutrally balanced and will have minimal effect on the total assembly, BUT if your crank and rods etc. are EXTERNALLY balanced I can,t see how the assembly CAN BE balanced without those components
related info
viewtopic.php?f=38&t=3900&p=13058&hilit=internally+externally#p13058
viewtopic.php?f=53&t=141&p=5391&hilit=internally+externally#p5391
viewtopic.php?f=53&t=259
viewtopic.php?f=53&t=89
viewtopic.php?f=53&t=204
viewtopic.php?f=53&t=6026