Does anyobody know or know where i can find out some factory specs on my 70' Chevelle such as stock weight and motors trannys and rear ends that come factory in different models of that year

The best sources of that kind of information are factory service and overhaul manuals and an Assembly Manual for your year of Chevelle. These books are available from various vendors.

Check the reference sections here at Team Chevelle:

http://www.chevelles.com/years/70/index.shtml

and check out www.chevellestuff.com (http://www.chevellestuff.com/)

If you have questions on something specific, just ask in the appropriate forum.

Welcome to Team Chevelle!

Bruce

Another good source is the published AMA specs from the manufacturer...good, good stuff, if ya can find it.