Being that the Pantera has been inoperative for 15 years, I SERIOUSLY DOUBT a few as you describe "relative minor repairs" will have you Pantera up & running.
First thing I would suspect is that your brake pistons have rusted/pitted. The brake & clutch cylinders have also experienced rusting/pitting & deteriorated seals.
ALL fuel lines & brake/engine/clutch hoses should be changed.
The carb/fuel pump should be entirely rebuilt/changed.
Electrical connections/fuses should be inspected/cleaned.
A 15 year old car ( any car) that has been stored/not running is akin to opening Pandora's Vase.
I am fairly experienced in getting stored cars running & road worthy/safely...Mark
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