I found three old four slot rims the other day. One rim is mounted on a BF Goodrich F70-14 tire. The middle treads show clear indication of one of many burnouts. I can't find the two letter code near the valve stem. Near the lug holes there is a stamping that reads GM 65. Second tire is a Goodyear F78-14 tire (tread is still good). No stampings on rim (painted looks like dusk blue) but there are four additional holes drilled within the lug pattern. The last tire looks to be rally green but not sure. No stampings and have no idea what it is. Don't have a digital camera to post pics of them. Just by what i've described, anyone have any idea what they can be? Thanks for any help in advance.