cleaning up the slant six head

Does anyone here have any info on what I could do to my to optimize flow, Id like to see an article with pictures at the very least, a step by step tutorial would be even nicer.

I would just be hacking into the thing without the mentioned help above and chances are I may do more damage than good.

The engine is original to a 1986 W-100 truck, it was of course not built specifically for the truck and I am attempting to optimize the engines capability.

I want people to say I cant believe theres a slant six in that thing, I want to re-engineer a few things with a personal touch so yes I hope something in the way of pictures is also avail.

Thanks for any help