At least you know the rings won't be stuck in the grooves. I have only installed 3 sets of headers on first gens in my time and they were all 4 tube hooker. Without a lift there is Absolutely no reason not to disconnect the motor mounts and raise the motor with either a crane, hoist or by jacking. It's simple quick and makes the job much easier. Also check for bad rubber motor mounts and missing support braces from control arm bolt to bottom of metal part of mount. I saw this once in a cobbled up car and the motor sat so low the front of the pan was rubbing on the crossmember even though the rubber mounts were new. Also I assume by your lack of asking that you know the reasons why gasoline ends up in the oil?
