Hello !Love the forum!. Its been very informative . I havent had to post anything on here yet due to so many questions I had already answered in previous posts. Great tool ! Anyway , I have a 64' toploader I picked up as a rebuilt unit. It has the 28 splines and the narrow bolt pattern . What Im wondering is , were the 64' bellhousings used on both the t10s AND the toploaders? I havent found one that has used a toploader behind it and I dont want to drill out my wide pattern bellhousing if I can help it . Where can I get a bell housing for this app without paying 300.00 for it? This is going behind my 65 galaxie with a 428 FE. THanks for any info provided. Im scratching my head on this. ALso , the wide bellhousing pattern I do have is C5TA-7505-B. is this a truck bell housing and if so why shouldnt I use it ? (According to David Kees website, you shouldnt use truck bellhousing. why?)