The Direct Connetion Performance Book (PN 4120792) is excellent and specific for MOPARS. I have read a number of books that have some misconseptions so be careful what information you use. A Stock 340 can easily make 300+ HP, so a 360 will be a sinch. Key points are good ring seal, excellent head with mild porting and best valves you can get (Ferrera is my choice). Bowl and port matching. Mild cam like the 268H or 280/480 which is close to the 340 Mechanical Cam (PN 3412044, 276/284, 0.444/0.453, 112° C/L). Pay particular attention to the distributor, both the advance curve and total advance. Limit distributor mechanical advance to 11° total (22° crank) so you can run around 12° advance timing at the crank. Vacuum advance should be about 50° total at 15" vacuum for best cruse timing and improved fuel economy. (Richard Ehrenburg's recommendation), but I did this in the '70's when FE was critical during the gas shortages.
This should get you into the mid 13's with 3.55 gears and good tires in an A-Body.