According to all my sources there was only one 1967 350ci crankshaft and the specs are as follows:
Rod journals 2.10 - otherwise known as the large journal (Small journals were 2.00)
Main journals 2.45 - otherwise known as the large journal (Small Journals were 2.30)
This information was taken from the reference book entitled CHEVROLET By The Numbers written by Alan L. Colvin
So therefore there was not a crankshaft made with mixed small and large journals....they were either one way or the other.