Danboquist
Newbie
I know, right? Some people are just gluttons for punishment.Since you have posted this, you have fallen into the rabbit hole, and the rest of us were just waiting for you at the bottom of it.
If your only ambition here is a "functional van", you should buy a replacement 350 that will mate up to your 4L80, EBL flash, and make sure you have a proper flowing exhaust. Remember K.I.S.
And this is coming from a guy building a 383 for a 16 year old, so whatever that's worth.