Need help with a cam selection for swap

Thanks guys I put the thumpr 279/296 in.. To my suprise it gave me that nice raspy idle along with the power I was needing! I tried it out on a little cruise with my 2500 stall convertor backed with 2.73 gears and it was a huge upgrade to what the 275/287 was! I thought for sure I was going to lose some torque and horsepower but to my suprise it was pulling harder than the cam I had in before. I have a 4 barrel 670cfm carb on and a Chevy style HEI distributor. After I came back my dad and I put my Muncie positraction with 3.91 gears and man what power... I can go through the intersection at 30 mph and step on it and go side ways with smoke peeling out the rear.. I think that people saying that the thumprs are more show than go are mistaken.. Unless the combination I am running is just perfect.. But thanks for all the feedback!