Brutus,
No, your pics were clear enough about what you're trying to do but unfortunately the pics I posted are all I have. That's actually the 350 bonnet in the pics with the Stinger cone on top. I understand your concern about fitting that to the rise in the big block bonnets. The underside shouln't be visible with a cowl fitted though so it's only the top angles you'll have to play with.
The only other thing I can do that may help is provide the name and number of a pro panel shop who specialise in custom mod work and fibre glass. They're approachable enough to give advice if you mention my name. Let me know ....
ps: It's actually Anal Retentive and I know what it means .... just ask my Mechanic, My panel worker, My interior guy ......... it's an endearing quality and very appropriate for restoring classic cars ... ;)