megalux

Hey all, I bought a 1993 Hilux LN106, 2.8 TD, 4wd, 18 months ago. Was only supposed to be a short relationship but now I want to sweeten her up. Anyways, I am blowing some large amounts of smoke under acceleration but not under idle. What should be the first things I should check? Have done regular oil changes/ fuel filter and she has 325k on the odometer. Is it worth just going for a full recon or not?