CAN YOU TELL ME IF I NEED TO SET THE PISTON AT TOP DEAD CENTER IN ORDER TO LINE UP THE THREE TIMING MARKS ON THE CRANK GEAR AND CAM GEAR ALSO WHATS THE CLEARANCE SETTINGS ON THE ROCKERS AND I NEED TO BUY A THROTLE ARM FOR THIS ENGINE ALONG WITH THE MOTOR MOUNT ARE THESE PARTS AVAILABLE

THANKS RICK NUNES