S(t)ubframe Question?

Does anyone have any pictures of what the subframe mounts look like.Also what is actually holding the subframe to the body(I already have all front sheetmetal removed).It looks like just two bolts below the firewall/cowl area and one about a foot further back.Is this correct?Can the entire subframe be rolled forward with the engine/trans still mounted to the subframe(being supported in the rear by a transmission trolly jack) or must the engine/transmission be removed first? I'm planning on removing the brake lines,e-brake cable,Steering shaft,exhaust pipes(duals),speedo cable.I planned on supporting the transmission with a trolly jack,removing the subframe-to-body mounting bolts,raising the body about a foot,and hopefully just roll the front subframe forward.Has anyone done it this way and is it possible?