No offense but these old cars are not jet engines or F1 cars. Any torque wrench is good enough. Sears was selling a Craftsman wrench for $100 I bet you could get it on sale in the $70 range. If the manual says 30nm and your wrench is a little to high or low no big deal. You are not going to ruin a part on these cars buy having it tightened to 32 insted of 30.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200