1/4 mile times

That combo you have (with a good converter) will go 12.0s all day long, if not high 11s, don't start throwing more parts at it, because what will you do if it STILL doesn't run right, its all in the TUNE period, everything needs to be dialed in, thats the "tune", guys in 440 A bodies with your stuff run mid 11s all the time, if they can do it, so can you, if i sound alittle "harsh" by making this statement i'm about to make, i appologize! Don't be lazy, you put this stuff together, now your looking to spend more changing gears/cam/heads ect., start tuneing what you have, i tuned a full second out of mine, your gears & 741 case are good to go for now, the .509 will run mid 11s easy, even that TCI 2800 converter will be good for 12s, i'm sure your intentions were to run as fast as possible when you built it, 106/107/109 mph is weak, that tells everything, if you were running 13s @ 117, then i'd say yeah, you have traction issues, so get after "what you have" & start tuning, you are going to find that the main 2 things that are holding you back are Timing & converter, you won't gain much by jetting if the carb has the stock jets in it now (i'll garuantee you that), i will say that most all MP cams are way off when you line up the dots, they will be retarded, Do you want a quick fix on the gearing, put some 26-27" slicks or DRs on it, those 275s are 28" tall, theres your 4.11s going with a shorter tire, it'll still hook great & you don't have to tare the rearend apart, start with the simple things 1st., you'll see it'll be running mid 12s in know time, get a good converter (that matches the cams torque curve), you'll be in the high 11s, low 12s i'm sure, & then it'll be roasting the tires at will, i met a guy that ran over 120 mph with a .509 cam. & iron heads, so the potentials there.