replaced distributor and now it wont start how can you tell if cap and rotor are bad

Easy way to tell if distributor cap and rotor are bad is by the manufacturer. If it's not AC Delco...it's probably bad ;)

This should help to align distributor correctly:

http://i561.photobucket.com/albums/ss58/cwhook/43LVortecFinding1TDC.jpg

http://i561.photobucket.com/albums/ss58/cwhook/Distributorrotoralignment43L.jpg


This is how the distributor cap is wired:

http://i561.photobucket.com/albums/ss58/cwhook/97newer43Lfiringorder-Copy.jpg