273 dilemma
I have a ‘67 Cúda equipped with a 904 & have found that it has the older 18 spline count (IIRC it’s 18 spline) impossible to find a (performance) torque converter for. At the time, a company down the block from me open up and rebuilt and re stalled the OE converter that is now 650hp capable. It wasn’t a extremely pricey thing, expensive yea, but the car is up and running with the OEM converter in the OEM transmission and cheaper than getting a rebuilt newer style trans and converter by far!
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ProTorque | High Performance Drag Racing Torque Converters