1982 Isuzu iMark diesel fixer engine will run with some things fixed

Description

Antique collectible 1982 Isuza i mark diesel runs but need some work nothing major 30 gal diesel tank in trunk a/c automatic mileage at 196 k body has very little rust.. on california no op so no back fees clean california title very little rust and no real body damage
classic little car but it does run when fuel system working properly injectors and pump are working properly glow plug circuit stopped working so need to find out why and fix fuel pump seems to not have enough fuel pressure...and fuel drains back into tank has been stored for over 2 years.... tail pipe is rusted where it goes into mufler was running when i parked...