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.....