My honest experience... converters

Back in the old days, we used Vega converters behind 350's. We could get about half a season out of one, but at $10 each in a junk yard was not a problem. In my 66 Cuda with a 170 slant, my new 9 1/2 edge converter worked better then my old 8 inch TCI. There was a big difference in technology between the two. Made almost 20 years apart. Stall speed (foot brake stall) was about the same, but the new 9 1/2 inch converter would launch harder, and MPH better than the 8 inch.
PS: Just a FYI about stall speed, and engine torque. 9 1/2 inch converter behind a 170 cid slant six, stall was about 3200 rpm, behind a 225 cid engine (everything else the same) stall was about 4,000 rpm (foot brake stall).