273 crankshaft, 5.2 Magnum

273 crankshaft, 5.2 Magnum

Hey, please, no apologies at all TMM! This is all in the spirit of getting to the truth of the matter, of everyone's benefit. You have listed a pretty definitive statement that helps things quite a bit.

Of course, we know that the 340 is not a balance interchange, with its higher bobweight.
And, as things evolved and combinations changed, the right sets of parts for the 273/318/5.2 need to be used to meet the target bobweight for those. So, in that sense, you are 100% right: a random interchange of parts may produce problems. For example: You can't put the super heavy 2 BBL wrist pins with 318 pistons and the later (758 gr) rods ... that would be waaay off.

Thanks!