My experience tells me that date would work. I have posted this info before, but my 3E (5th week of March) car has a rear axle dated April 7th! Top that !?
I , like others, try to extrapolate information based on what we know about build dates. Using the 912 a day production quota (going by memory, so forgive me if I am off), I use the CRG page http://www.camaros.org/geninfo.shtml#HowMany
comparing end of month production and calculate my vins accordingly with days of production to calculate build date. This calendar year, 2014, some may have noticed, is the same date/day corespondence as 1969, so today, Friday 5-2 also fell on a Friday in 69. Not relavent, but just pointing out a fact. Anyway, I'll point out a caveat about 3E being only one day, Monday the 31st of March, which I feel in reality 3E must have encompassed the first week of April. The ending Vin for March according to the chart for Nor. plant is 62,3587. My car is 62,84XX almost 5000 past the supposed last March Vin. This would point to my car being built using the 912 per day formula as about 5 days into April, I figure. Considering there were 4 working days after the Monday 4-31 and then the weekend, I surmise the car was rolling off the line about April 7th or 8th. BAck to the rear, it has a build date of April 7th. I wonder too how it could be this close, but it is. As pointed out in other similar topics, the TT date is loosely in line with calendar dates, so maybe the car was completed more like on the 8th or 9th of April. Nonetheless, I can use what I do know and I have no reason to believe the rear is nothing but the born with component and conclude that some components can be very close. As a comparrison, My 11D car has a 11-22 axle, but so does my 12B car, same date, same BS code. If anything, I may have question about the 12B being Born with, but it has always appeared as untampered basd on brake lines etc..and has been that way at least the 35 years I have owned the car. So, one car is within a month of build, one within a week and one within a day(s).