I have a 67 Dodge Coronet R/T with a 440 and 727 tranny. I rebuilt the motor about 6 months ago and the car has about 900 miles on it. I didnt go crazy with it, it has a mopar 284/484 purple shaft cam with stock heads and a .30 over bore. I have an Edelbrock Performer intake and a Holley 770 cfm carb. It also has 3.91 gears in it. My problem is that I think that I have the wrong torque converter in the car, it has 2400 stall but I forgot what brand it is. There are times that when I give it about 3/4 throttle it will just boil the tires and then other times it will just down shift and sort of bog down and slowly get up and go. This same thing happens when I give it full throttle. I have one of those cable kickdown linkage systems from Mancinni on it that is supposed to auto adjust when you give it wide open throttle so I dont think that it is the kickdown linkage being adjusted improperly. I just dont know what would make it act SOO differently at times. Any help or advice would really be appreciated.

 

The carb has mechanical secondaries, how would you adjust them? Also what would you recommend that I set the timing at, or what should it be when I check it? Thanks for the advice thus far guys.