hey fellas , i have a annoying problem thats driving me crazy , heres the skinny on my woes , quickly heres what i got , brand new 302 forged bottom end forged pistons pro comp heads 2.05/1.60 24lbs inj accufab tb 70mm+egr ford motorsport maf conversion kit 73mm C&L gt-40intake smog delete a/c delete 190lph Fp FP set @ 40 timing @13 erson cam 544/544'' new plugs , wires , distributor new flywheel , clutch 2 yrs old , 70% life ( motorsport king cobra) stock t-5 Heres the problem as im driving at lets say anywhere under 1500 rpm's the car will buck violently ( like it does when when a newbie driver first starts out driving stick and they let the clutch out with out enough gas and it bucks back and forth untill the clutch is put back in ) thats the same characteristic that my ride is having under 1500 rpm no matter what gear i could be driving in 5th and as soon as it goes around or under 1500 and i let off the gas it will buck. as soon as i hit the gas again it goes away and if i push in the clutch it goes away , same with parking lot driving i push in the clutch and the bucking goes away . I checked codes and i do have a speed sensor code along with some emissions codes ( prolly due to no smog) , i checked the speedo gear on the cable side and it looked fine , my car is a 87 w/o cruise control im not sure what else to check PLEASE HELP . sorry for the long novel , any help will be greatly appreciated thanks !!