On My 84 300D there was that issue of room for the Torque Wrench if had an Allen Socket on it. I solved the problem by replacing some of the Allen Head Bolts with a regular Hex head bolts.
I found a short 12 point socket for the replaced Hex Head Bolts and was able to squeeze a Beam Type Torque Wrench with the short Socket for those Bolts.

In another thread I read I Guy had a Mechanic do the Gasket Change and the Mechanic removed the Steering Box. If that is done you can torque the stock bolts.

Also My original Gasket was just Paper and was not glued on.

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84 300D, 82 Volvo 244Gl Diesel