I just got done reinstalling my 5.0 in my 1988 ford mustang with speed density no "no mass air flow".I installed new timing chain cover new oil pan and gasket, new oil pump ,a set of crane roller lifters,new timing chain,new water pump ,new push rods,a pypes x pipe with no cats,mac shortys,mac mufflers new o2 sensors new gaskets all threw the top and bottom,e303cam,polished 70mm throttle body and egr spacer and a new set of injectors. My msd distributor got knock off a work bench and cracked the base where the cap locks on.I see no arching to this crack and is high enough where the cap still covers it. I am getting great spark at the msd coil I tested the msd ignition module works great.Im getting no spark or maybe a extremely weak spark?I was planning on doing the mass air conversion next do to the e303cam but need to find out why i cant get my car started,The rotor is spinning. I put a plug in the end of the wire and cant seem to see any spark unless I use a lawn mower plug even then all i can see is a super lite spark i even turned off all the lights in the garage making it pitch dark and am unable to see any spark threw the iridium or a new set of motorcraft plugs. When i first installed the cam i wired it clock wise oppose to counter clock wise and was getting backfires.Right now im wondering maybe i missed a plug somewhere Since i had the motor completely removed?Or did my distributor really break that easily?Any other test i can try to determine whats going on here?Any help would be great thanks in advance.