Engine Combo Questions

Ok be easy on me I have a lot questions that might seem stupid but I am just ignorant. Now that the disclaimer is out of the way Here are the questions.

I would like to build a engine combo that put down about 300-350 at the rear wheels and make a "torque line" I want to talk the old man into giving me the 73 scamp on the cheap as a platform to have some fun at the track getting sideways in but still get out of its own way down the straights and maybe some drags. I am looking at some engine options, thinking 360ci but should I start with a magnum or an older 360? as i under stand it the magnums have quench type heads, hyd. Roller tappets, 1.6 ration rockers etc. and are pretty good in general but intake manifold selection is limited to 2-3 choices.
Pump gas is a must as i can then cruise it and keep the misses happy so that would limit me to about 9.5:1 maybe 10:1 with a big cam but, too big = no torque on the bottom-mid etc. So that being said

Options on heads
Which head is going to flow best in ported form?
Crane came gold rocker arms worth the $$?

Cam Options
What profile?

Bottom end
Stock crank and rods ok for these power levels?

Any help would be appreciated so I can get a game plan going on the power plant