I have recently put in a new to me motor in my 87' 60 and it really runs great. It start great, idle very smooth and drives great. It also has been fully desmogged. However, I have been noticing a very slight flatspot when accelerating in 2nd and 3rd gear. It is very minor. I wouldnt even call it a hesitation, but when I near 3000 rpms, for a second or two before up shifting it just seems to go flat but continues to accelerate then I will shift and its fine. Hopefuly this description makes sense. Again it seems very minor but I do notice. I dont know if this is normal or not. Has anyone had similar observations, or does anyone have any suggestions for adjustments I should look into? I have checked my timing and have it slightly retarded ( timing mark on flywheel is just to right of the needle on bellhousing) I have not had my dizzy recurved and am wondering if this my be the issue. I am planning on doing a valve adjustment today, but I doubt this is my issue as there is not much valve noise. Any thoughts or recommendations welcome. Thanks