my car wont start!!!help

[vboy720]

i recently did a engine swap on my 90 240sx. yesterday wen i tried to start my car, it was turning over, but then i herd this big grinding noise so i stopped. wat could this be???? oh yea, my car is an automatic

[matlock]

*cough* Tech Talk *cough* ;)

[the head]

there are many engines on can put into an S chassis care to specify which one you so brilliantly swapped in?