Could anyone possibly tell me what the original flywheel size diameter and tooth count was on the factory 4 speed .I have heard 10 inch 148 teeth ,10 1/2 157 who knows . I have looked in the forums searched and all the mustang II sites and been to the Auto Fair at Lowes motorspeedway a few times and asked all the ford people and know one has or seems to know anything about the 75 -78 cars or trans unless it is modified .This is the trans number RFD6Z-7006-CA,bellhousing we have is D6ZA-6392-BC-1 .[:@]

Also if any one knows what other flywheels and bellhousings will work that would help. We were told an 81 flywheel would work but it wont fit in the bellhousing.

I'll check the info that I have. I don't have it committed to memory. The bell housing is SPECIFIC to the Mustang II's. You'll have to some banging and bending or cutting and welding to get any other bellhousing to fit. It's smaller the "other" more prevelent bellhousings. If you're in a hurry, try checking out www.mustangii.net (http://www.mustangii.net) they have a ton of info over there. I'm not at home right now. Won't be able to answer you until late this evening or tomorrow morning.

Thanks i looked at that site for about 2 hours yesterday but couldnt find any thing specific about the size also tried putting part #`s in there seach section and it gave me an error . as of right know going to try 3.8 bellhousing out of newer stang old 4 speed and an old aluminum fly well my father in law has .He has tons of ford stuff just all in finding and identifiying .

Take a look at this site. It's a 141 tooth flywheel 11 1/4".

http://www.pigseye.com/sadie/MustangII/index.htm
and
http://www.napaonline.com/masterpages/NOLMaster.aspx?PageId=470&LineCode=BK&PartNumber=6 005058&Description=Flex+Plate