Hi guys, I just recently bought a Toyota land cruiser 1990 80 series petrol 4.5ltr for $4,000 as a spare time hobby thing.The engines running a little ruff, Its spitting oil out of the exhaust also. Its got a 4 inch lift already, 33x16x8 50/50 Micky's, $1200 stereo system, and LPG. My question is should i rebuild my engine and if so what is the best resource to use such as Manuals, DVD Guides, Tips and tools. Also i have a budget for this part of the build like most, so i would like some kind of idea on cost as well? thanks.