did you put the ''buckets and shims '' back where they came from. the buckets are interchangeable when factory new (not sure about them after 100k miles of wear), but the shims are specific to each valve and determine valve clearance.
if you did all that right, you used the wrong timing marks when you installed the belt.
what alignment marks did you use?
NOT the ARROWS, NEVER the ARROWS.
those are the two most likely causes.
even if the valve shims are not perfect, if you put them back where they came from the engine should start. so if you paid attention to that, the timing is off.
being mistimed, is the number one cause of a no start situation after major engine work.