360 timing

i would prefer a drop in with minimal/no wiring changes. and the jegs options are way out of my price range for now. i have no problem with the "chevy" type cap. but my goodness on my 74' to say it would be REALLY tight would be an undersatement. and I can't help but think there is a lot more to buy to get the gm hei cap distributor to work on my 360, is the mechanical advance easily adjusted in that unit?