New guy here. Thinking about buying 83-85 300sd... any words of advice when shopping? Will 35 year old age - kill that motor? Do I spend more for the Lower mileage one (80-120k?) or spend less on the 150-180k car-- knowing both will need lots of rubber/joints/bushings/etc. to be replaced.

seen a few with little puffs of smoke coming out of oil filler (when i take cap off)... is a little smoke- ok? Or deal breaker

any advice would be appreciated

Or am I crazy to think I can make one of these my DD?