You may find when you want to swap to rear discs that the 2" reversed rim will not clear the monte caliper. I tried to test fit a 2.5" reversed rim from summit on my 40 with the chevy discs and there was no way I could see it fitting. The issue is when you reverse the rim shell you get the real narrow part facing inside. That is why I returned my special order rims and went with standard 3.75 steelies with spacers. With only 2" you may get lucky and they will clear without spacers.
Very nice looking 60, Bob told me you are going to join us for GSMTR this year. Looking forward to wheeling with you again.