so i was adjusting my valves and a friend came over and basically took the reigns on the project while i tinkered with my other buddys banshee. basically he ditched me and he has both my cams out for some reason and i cant seem to get the timing right. i got the piston at TDC and when i put the cams in and have the marks lined up with the case, the exhaust cam seems correct but when i put the intake cam in, the lobes are pointing down and wanting to open the valves. i must be doing something wrong. i have a servie manual but im not finding much help out of it. so basically can someone give me a good timing procedure please.