Not any more progress, just some rambling thoughts, while I wait…
So it seems to me that if you have a 1966 Mustang (and maybe other models) with a small 6 in 1966, it’s a bit difficult to plan your transmission upgrade unless you have it apart, right in front of you and then you’ll need some assistance from Modern Drive Line or California Pony Cars. Reason being that there seems to be no rhyme or reason to whether you got a car with the Dagenham 2.77 peanut 3-speed or the Top Loader 3.03 big chunk of iron 3-speed.
I thought maybe that it would have to do with what month your car was built in but I was having an offline conversation with
@fritschn yesterday and he laid that theory to waste. I mentioned the wrong plate debacle and my theory that it was based on when you car was assembled; mine was born June 20, 1966 but his was born July 1966 and it has the Dagenham 2.77 3-speed transmission. The kit I bought is the perfect fit for his car.
Anyway, after too much coffee and a lack of more productive hobbies, I figured out which kit California Pony Cars carries that is specific for 1966 Mustangs with the L6 200 and Top Loader 3.03 transmission.
My criteria:
- Adapter plate TRA-650-526
- Cross member TRA-656-522
- Slip yoke TRA-650-517
- Transmission insulator mount TRA-650-521
The CPC kit for 65/66 has all the right parts. It’s a kit for the 289 V8 cars and it doesn’t say that it works with the C7ZA-6394-A bell housing but since the adapter plate TRA-650-526 is specified for that bell, it’s obviously the correct kit. I’ve let the guy I’ve been in contact with know my findings and recommended they update the website docs to correct the page so other unfortunate souls won’t lose several weeks and probably a minimum $100 in shipping and fees.
Here is the correct full conversion kit for a 66 Mustang with Top Loader 3.03 3-speed:
https://calponycars.com/products/1965-1966-t-5-5-speed-conversion-kit-1?_pos=8&_sid=ba9c2387b&_ss=r