Junkyard 5.9L Magnum + Edelbrock LA heads build

Also I don't have a drill press so drilling a hole through a bolt isn't really possible for me but it would be ideal...
Careful work with a hand drill will do it. And brake line can be used.... plenty of fitting from inverted flare to NPT. I'd put a 1-2" loop in brake line to give some expansion room.

Honestly.. I would probably get 90* fittings instead of 45s the ones I have stick out a fair amount and I'll probably have to change them later on.
Yes, those 45 degree fitting look problematic. but the whole deal looks nicely done!

Do you have any provision for adjusting a restriction to control the flow? Perhaps a straight tapped holed behind the angle fitting in the head, to put a changeable restriction? I am imagining a Holley jet for flow control! (Brass in aluminum is not a good idea unless you can keep all water away... which seems the case here.)