1970 Challenger sector shaft size?

Hello everyone! I've purchased a new gear box from Firm Feel for my 70 Challenger. The sector shaft on the new one is much smaller diameter than the box on the car. Pitman slides all the way to the box. So, should the 70 have the smaller sector shaft or the larger? I'm hearing conflicting info on this. Thanks in advance! Jeff

The 70 has the smaller shaft unless it is a T/A box. 73 up used the big shaft.

Thanks, Fastmark! I don't know how mine got switched to the larger shaft. I thought (usually wrong tho!) I had purchased a 1970 box from Year One (3 years ago) and also a sector shaft for a 1970. I know it was expensive! They are the large diameter tho. I thought for sure I bought the 1970, non AAR item. Now, I get to buy another for the smaller diameter sector. Oh well! Thanks! Jeff