I think Im understanding a bit more, and I asked the fellow about the 302 heads, they are 1990 302 heads, does it matter that there not late 80's? Though they would've been made in 89, are all 302 heads the same stock? If so, they will be my new heads.
The 302 head was instaled on engines from 85 - 87 I believe. I'm not to sure when they stopped installing them or making them.
I know after 1991, the 318 "LA" was stopped in favor of the Magnum set up. What was on top of 318's from 87 to 91 i'm not sure of. But they were more likely to be a swirl port head good for the same treatment as a 302 if not being a 302 head itself.