is yours adjustible? if it isnt an adjustible one is nice for fine tuning but it shouldnt prevent you from geting decent timing, loosen the bolts on your distributor enough so you can rotate it slightly, start with it turned all the way to the right, have someone else turn it over and if it doesnt start SLOWLY turn it to the left and see if it will fire up. if not you will have to set your gam gear to top dead center and its because your belt skipped a tooth