Ok, not trying to hijack the thread, but same question.The OEM sizes were 10.75" and 11.75" diameter. Cam being used can be important as that can relate to the engine's base hot idle speed and how much the converter "loads" the motor when in gear at idle.
Here we go again. WTF are you working on!???
6 pack rods?
Other than that not a problem!
One more point to of curiousity. Is that the original Chrysler Pur Shadt Street Hemi 284/284/.484 cam or the later "aftermarket" Purple Shaft cam? The differences would be the .050" duration. I suspect that something like the '68 Road Runner 383 10.75" converter might be pretty close to what you're needing. Enough basic stall speed to work with the cam and not too much to allow for nice highway cruising, I would hope.
Just my theory,
For sure. Lenny is retired. KimOur cars are heavier than the cars that the off-the-shelf torque converter‘s are designed to be used in. My recommendation based on my own experience and the experience of several other people that I know is to contact Ultimate Converters. I dealt with Lenny. I think that you will find that if you supply them with the right core torque converter, which is likely to be a hemi torque converter and let them custom build a torque converter for you that you will spend about the same as if you bought an off-the-shelf torque converter and you will be much happier. Give them a call, tell him about your car your engine your rear gear etc. and let them tell you what they recommend and what the cost would be. I think it would be worth your time to spend 10 minutes on the phone with them.
4 speed conversion time.