I got such a great response to my previous post I thought I would ask a few more bellhousing questions for my own edification.-I have a C5AA-6394A which david kee site says is a 65-67 11 inch clutch version--It has the very prominent "bulge" that I associate with an 11 1/2 bellhousing? I got another C5AA (have to go look at the rest of the part number as it is at home) that has a very slight "bulge". Are these differing bulges associated with clutch size or just a varation betwwen different foundaries??Did david kee get the part numbers (ie A vs B vs D as last letter in part number)mixed up on his website??

your numbers and bulges. They should be the same. Just for shits, check the date codes, if in fact they are the same casting # and look differant.

I checked the "lesser" bulging belhousing--exact same part number I will go back and look at date codes---exact same number but obviously different--probably happens all the time

Looked date codes may not be much help--the housing with lesser bulge is a real distinct 4G31 the one with larger bulge looks like it was victim to a hammer blow--Maybe 8J20 which fits the date number order but it looks like G920 which is out of order? for a date code--food for thought?

one is really early there was probably a casting revision. Is the last letter after the number the same. Or is one A and the other B or C.

both part number same including the A at the end of part number that is what I thought was odd.--one looks just like the CJ BELLHOUSING FOR 11 1/2 CLUTCH AND THE OTHER DOES NOT---David Kee lists B and D as the 11 1/2 clutch version and A as the 11 inch --somebodys wrong-- just curiosity on my end.