Here goes. This week I helped my Dad drag up a 55 Chevy truck for a hot rod project. Well anyways We're confused as what the rear end is I know that stock it would of had the old banjo type rear end but this one is a Dana axel. Well I looked under it and said well it looks like a Dana 44. My old man said are you sure. So i climbed underneath it with a light and wire brush and cleaned off the lower right hand corner of the diff housing next to the cover where it sould say 44 right. Well this one said 45 /forums/images/graemlins/confused.gif. Now were at a loss as to what it came out of, it does have a six lug pattern. Although it dont really matter cause it wont hold up the the 454 that is going in it. So the next question is what would be a good rearend for this truck and still keep it six lug? I already checked a 12 bolt that I have and its 2" wider.