So on two completely different cars I've had I've found some oddness with the engines. Both cars had ho 5.0s tho neither was supposed to. The first was an 83 caprice with a 305 ho. According to info I found it wasn't even available in caprices till 84. Was before I understood rpos so I didn't check those. The second one is my current 86 cutlass. From what I've read it was def an ho 307. I knew RPO thing this time around and the car had an RPO for a base 307. Both cars were bought new by really old people. I know the second owners of both(second owner of caprice in bro in laws dad lol) that bought both cars from original owners in early mid 90s. Both were granny specials(tho the olds had f41) down to power everything, wire hubcaps, and pillow top seat and vinyl tops. Were they an early warrantee thing? I could mebbe see the olds having it dealer installed as they used it to pull an aerostream trailer. But the caprice?