1955 Ford F-100 w/ 67' 273 & 4 speed

The engines displacement is stamped below the drivers cylinder head but is hard to see, check the drivers side of the block for cast in numbers which should have the size cast into it.

On the trans, check the side pad for the numbers as to where it came from.

A 4spd has 3 levers and a 3 spd has 2 levers.