My little bro has been looking for the body moldings for the front and rear between the bumpers to the body. They were originally made of a rubber that has since deterierated. ANy suggestions on where to find these would be helpful. Thanks Seanner

'76 is getting back there in years, but I have found a lot of parts by using this used car parts search tool. It's woth a try!

http://www.car-part.com/

It will be hard to get those bumper fillers.... only '75 and '76 are interchangeable (fronts..... 74-76 for the rear). I have found 2 originals in the last 4 years... in the mean time I had a pair from Replica Plastics (fiberglass in stead of the original Urethane): http://www.replica-plastics.com/
But you will need to change those a bit and dril a few more holes to make them fit.
BTW: ever noticed how unpopular the 75 and 76 models are?

There is one on eBay..... about same price as Replica chargesfiller front (http://cgi.ebay.com/ebaymotors/1975-1976-BUICK-RIVIERA-FRONT-LEFT-BODY-FILLER_W0QQcmdZViewItemQQcategoryZ34204QQitemZ4585 962286QQrdZ1QQsspagenameZWD1V)