Its my understanding that 67 got early, 68 up got late. But dont take this to the bank.

Ok , thanks I was thinking it changed in 69

That doesn't work considering mine is an Aug 69 build and it has the early version.

Hey guys, as it turned out, I was able to find a good 621 bellhousing (the later one) locally. Thanks for all your replies and help!

Please go ahead and continue your discussion on this thread if you like...