92 Stock SC, replaced head gasket and hasn't run smooth since, starts right up doesn't miss, but shakes badly, put it in reverse and it dies, can feather with gas pedal to keep alive. Vacum at about 15 at idle, shouldnt this be about 20 at idle?? after headgasket, hit deer, replaced all the following recently; IAC, DIS, Coil pack, sccoa suggested plugs, ignition wires, ICM, water pump, IC gaskets, crankshaft sensor, resealed plenum, etc. Took off cowl and put clamps on both vacum tree hoses. sprayed with carb cleaner to find leak, put 20lbs of pressure, sprayed with soapy water to find leak, no luck. No power, will idle forever while shaking (noise coming from idler pulleys, but believe due to shaking). Will stall when put in reverse or drive. Do I defintely have a vacum leak? Thanks in advance, also new engine mounts.