360 instal, going on 3 days, need help

Well I got everything hooked up this weekend and tried starting it: it turned over but sounded sick... something is wrong. It cranks slow and there is some kind of metal dragging or scraping sound in the background. Its a noise I am unfamiliar with, and therefor worried.

I just re-read all of your posts and think that Dusterdude may be onto something. I thnk I need to split the tranny and engine and take another look at things. Sucks. It was alot of work getting it all done. I just pray I don't have to mess with the headers, they were a royal ***** and I'll never buy them again, unless I go Dougs.

Question: Could I have f'ckd anything up by cranking it over like that a few times?

Advice? Any is appreciated. Thanks