I’m working on a 1947 farmall cub, it hasn’t ran in 40 or so years,I’ve never personally had it running, when I started working on it it had no spark, I sent the magneto to a friend and had him rebuild it,at the same time I installed new plugs and wires, since then I have still not been able to get it running, I’ve been through the whole process of timing it according to the manual, and Wisconsincubman’s YouTube videos,both front pulley and govener marks line up at tdc,I have good spark now, however it dosent even attempt to start, backfire,nothing. at what should be correct timing,according to my timing light it’s at about 60 degrees advanced if you pull the magneto closer to the block you can get it to about 38 degrees advanced,the timing marks on the rotor button and the pinion gear that turns it are lined up, is there anything else on this thing that can make it out of time?