it will not slide in with the correct alignment. you have to find an alignment that WILL let you slide it in and then rotate it to the correct position. it may be a little tricky to get cam to sit in the correct position but you should be able to get it. but it is only critical that it is correct when you install the belt. up till then it can sit anyway.
PS: MAKE SURE THE CRANK IS IN THE CORRECT POSITION. this will guarantee that none of the pistons are at the top of the cylinder where they would hit the valves.
PS: MAKE SURE THE CRANK IS IN THE CORRECT POSITION. this will guarantee that none of the pistons are at the top of the cylinder where they would hit the valves.