'72-'80 vs '71-back 904 converter differences

dragbaron said

Torco brand #762HS-21

A904 high stall torque converter Non-Lockup 1700-2100 stall 27 SPLINE | eBay

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This is a factory low stall converter for a 1968-Up 904 with either a slant six or a 318 in front of it. There was also a factory high stall for the same engines that stalled around 2300 rpm.