1987 Dodge D150 pickup 5.2l 318 cid

Pardon, how old are you?
Do you have much in the way of automotive experience?

I ask because you are all over the place and picked wrong parts, description of what you want to do is not clear. Do you want to stay with the 318 or or?

The engine is small for fitting into any of your descriptive words and your shying away from a stroker (that’s fine) but them word it like it limits you or the stroker kit is a limiting issue.

It seems close to you not having any real idea of what your doing with the assumptions.