Hot Rods Nailhead experts

I have the opportunity to acquire a 364 nailhead that I would like to put into a 40 Ford project. I want to hook a TH400 to it but, the adapter kits run almost as much as the engine and really puts it above the budget. Are there any alternatives or any used kits available?

 

Find a Buick transmission is your only other option. They used a version of the TH400 called the ST400 in 64-66, I believe. If you can, get the torque converter with it as it is a "switch pitch" converter. I believe you can use a standard torque converter, otherwise. @Bangingoldtin can tell you for sure.

 

Thanks rockable

 

I think the only Buick transmission that will bolt to your 364 is a Dynaflow and you probably don't want that. I think your only option is to buy the adapter or trade the 364 for a 401.

The 64 Buick 400 transmission does not have the switch pitch convertor. The 65 and 66 400's do. The switch pitch will only shift to the higher stall if you send power to the solenoid inside the transmission. You can use the convertor without connecting the solenoid and it will act like a normal convertor and stay in the low stall position.

 

I'm in East Tennessee and have a 401 with TH400 and another one ( a 66) with switch pitch 400 for sale in the classifieds. Took the 66 out of a running, driving Wildcat years ago, it's been in a dry basement since. If that helps.

 

The 364 is a good motor for that project, and you will need a TH400 with the nail pattern. 64 was the first year and a one year only as it did not have the detent to hold it in second. Valve body was also a one year only. I do have a fresh one if interested. 65-66 were switch pitch. You can use a regular converter in it as @jaracer said. You also have to remove the fluid reducing plug in the front of the case behind the pump. AMC also used that case up to about 1971 or so behind their 327 engines. They are not too hard to find and have the later roller clutch in the output section. You will also need a crankshaft adapter for the smaller torque converter crank lug, which is available from Centerville.