What model is this pickup??please!

Hey everyone, theres this truck im interested in buying off of this kid. But i have a few concerns since im not all that knowledgeable in these matters. 1st off, can anyone tell me waht kind of chevy pickup this is? i have no clue. All i know is that its a 1972. 2nd, The kid tells me it has the original 350 and aside form some valve tapping, there are no other problems and it only has about 70,000 miles on it(apparently he got it from an older man). My friend seems to think the odometer was rolled back or its a replacement dash. Im pretty nervous about picking this up since theres quite a bit of unknown info. Should i just take it for a drive and see how it runs and base my answer on that? i really want this truck.

thanks for all the help.

http://www.angelfire.com/ar3/whatchevy/hmmm/

buy it how much is it