Anyone running overdrive transmission?
200r4 adapters are also avail from TCI, and Wilcap. With the adapter plates you don't need a custom torque converter. JW bell makes a adapter bell/flex plate too.
True, however the TCI and Wilcap adapters use the 3 bolt GM torque converter for a given GM transmission, a crankshaft spacer and a very large plate that sandwiches between the block and the transmission. The plates stick out beyond the engine and transmission further limiting space for needed components. Both plates can be successfully modified to fit, and several members have done great jobs getting them to work. Both plates require a lot of trimming and fitment to clear exhaust and other components, especially the TCI plate, in an already tight fitting area around the block/transmission and the firewall of the car. My '68 Barracuda has limited room there already.
Also, the plate style adapters would not allow me to run the factory OBDII EFI, as the tone ring for the injection system is an integral part of the factory Mopar Magnum flexplate, and the crank position sensor bolts the back of the block to access the tone ring holes.
Plus, I was going to buy a custom HD torque converter anyway. I like the idea of a high efficiency, 3000 rpm stall converter with 3 carbon fiber lock-up clutches activated with a single 12v wire. If you are going to do a lot of drag racing, skip the lock-up feature, as it takes more power to spin it. Modern torque converters are very efficient.
The JW Bell does not have an application for a 200R4, but they do make one to fit Turbo 350's and 400's to a Mopar. It may or may not fit the newer GM overdrive transmissions.