Hello Fabo, Can you help me determine what stall converter i need? I've read that generally, you can take the rpm where the cam starts making power and add 500 rpm to that for your tc stall. I haven't read enough to see how the tire height and vehicle weight come into play. My car is a 1968 Plymouth Barracuda notchback that is fairly stock. It does not have any weight reducing upgrades. Engine is a 340 .06 over, flat top pistons, Lunati Voodoo Lun10200703 cam Duration 268/276, Lift .494/.513. I have 3.23 gears and the tires are 225/70/14 26.4" diameter. I currently have a stock converter. I'm about 200miles on a rebuilt engine so I have not floored it from a stop, but I can tell it's going to be a little sluggish. Your help is appreciated.