I've also got an HEI setup on my 304 but i got it from Performance Distributors or as others say a DUI dist. and i also opted for their premade and numbered Livewire set......but i think i was paying for the name and looks on them :-|
Oh yea.....as far as where you've got you vac. advance.......same way with mine right out front almost touching the power steering belt. I tried to run it in diff positions but i coul'dt get it to fit right any other way so i dropped her in and said the hell with it cause i dont need to adjust timing that often.....