13's, stock '71 318 short block.
Done some more research into solid cams. Using Camquest, Comp recommends the XS268S for my application over the 270S. Plugged it into Desktop Dyno which says 355 hp with the RHS heads. Not too bad! Volumetric efficiency seems to suffer a little with a solid cam though. On paper the Voodoo 60403 still shows the best VE results with 96% @5,500.
In other news... have not been under the car recently but I will probably have to deal with a rear main seal leak before I start beating on it. Might replace the oil pump and pickup while the pan is off. When I have everything ready to go I'll address those things.