To clear your mind... .lol.... A Torque Converter is the same thing as a Stall converter. Stall converter is just slang for a performance higher "Stall" speed converter. ZZP has an article on there site now, or they did anyways about advertised stall speed ratings. It is just a general number that really doesnt mean much. Every engine will cause it to stall at a different rpm. M90 cars make lots of low end torque which will make a converter stall at a higher rpm than an NA engine that doesnt have the low end torque and this number car greatly vary. A 2750 converter, or any "shelf" numbered converter may not stall anywhere near that and is moreless a ballpark number that may not have any relation to your setup. Stock GTP 258mm converters are only rated for around 1700-1900 stall rpm but they really stall anywhere from 2700-3200, thats right that is NOT a typo! Mod dependant the stall speed is going to vary greatly and those converters ratings way off unless used in an NA application. Some of the larger cars like the Bonne's used the 258mm converter with the L36 which would have a much lower stall rpm which would be closer to what they are rated. A 245mm converter-like your ZZP blue converter- will require an L36 flexplate, billet flexplate with correct holes, or a drilled flexplate to accept the holes, so you are fine using the L36 flexplate though they are balanced different but I have not run into any balance vibration issues nor have I seen any long term damage caused from it.