Torque converter size

mmzullo said

Hi guys,
My 72 340 duster has a stock torque. Here's a little info of my engine. Stock heads, purple shaft cam, 10 to 1 compression,and stock manifold w/holley carb. It dosent like to idle in gear so I need to upgrade my T/C. I built this engine about 20 years ago(dosen't have any miles on it). I've been using it more and drivability is becoming a pain.
My question is a 2000 to 2400 stall converter a good choice? How many inch? Is a stock converter 12 or 13".
Thanks Mike

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Your converter will be either a 12" or 11" converter. Wide ring gear(about 1") is the 11" converter and the narrow ring gear(about 1/2") is the 12" converter. If it's the converter the car came with when new it will be the 11" unit.
As far as to what stall you want, it depends on a wide variety of conditions(cam diff. ratio, tire size), and what you are using the car for. There have been a lot of posts about converter stall speed with some good and not so good information. Send me a PM.