if its a flathead the carb will be mounted right of center with the air intake tube leading to a round air cleaner cover, ifs its newer the carb is mounted left of center and an oil filter right below it with the air filter box ( square ) mounted on top of battery........i love my old flathead very fast and dependable but hard to find some parts.........if you put another motor in it keep the old one its not worthless at all...........if you change to a newer motor you,ll also need a retro fit kit as the newer motor won,t just drop in and that kit is another 450.00 or so besides the 1600.00 for the motor...........................